Curriculum Vitae
Here's a PDF version of my CV.
Asher Auel
Gibbs Assistant Professor (Postdoc)
Department of Mathematics
Yale University
10 Hillhouse Avenue
New Haven, CT 06511
Email: asher * auel AT
yale * edu
Web: math.yale.edu/~auel/
Born: 1981, Oregon (US citizen)
Languages: English (native), French (fluent), Hebrew (working).
Programming: HTML/CSS, LaTeX, Maple, Magma, GAP, C.
Education
2009 May 
University of Pennsylvania, Philadelphia,
Pennsylvania, USA
Ph.D. Mathematics
Ted Chinburg, Ph.D. dissertation adviser
Title: Cohomological invariants of line bundlevalued quadratic
forms
Research areas: arithmetic geometry, quadratic forms, Ktheory

2004 Jul 
Université ParisSud XI Orsay, Paris, France
Diplôme d'Études Approfondies (DEA) Mathématiques Pures
Guy Henniart, DEA thesis adviser
Title: Une démonstration d'un théorème de Bernstein sur les représentations de quasicarréintégrable de GL_{n}(F) où F est un corps local non archimédien

2003 May 
Reed College, Portland, Oregon, USA
A.B. Mathematics
Joe P. Buhler, undergraduate thesis adviser
Title: Volumes of integer polynomials over local fields

Appointments
2013  present 
Department of Mathematics, Yale
University, New Haven, CT, USA
Gibbs Assistant Professor and Postdoctoral Associate

2012  2013 
Courant Institute for Mathematical
Sciences, New York University, New York, NY, USA
NSF Postdoctoral Research Fellow (Sponsor: Yuri Tschinkel)

2010  2011 
Max Planck Institute for
Mathematics, Bonn, Germany
Postdoctoral Fellow/Guest

2009  2012 
Department of Mathematics and
CS, Emory University, Atlanta, Georgia, USA
NSF Postdoctoral Research Fellow (Sponsor: R. Parimala)

Federal Grants
20162018

NSA Young Investigator Grant (PI)
$39,339, H982301610321, "Azumaya algebras and rationality"
October 2016December 2018

20132015

NSA Young Investigator Grant (PI)
$39,755, H982301310291, "Clifford algebras in arithmetic and geometry"
August 2013August 2015

2011

NSA Conference Grant (coPI)
$14,800, May 2011

20102011

NSF Conference Grant (coPI)
$24,295, DMS1068423, May 2011

20092013

NSF Mathematical Sciences Postdoctoral Research Fellowship
Scientific Sponsors: R. Parimala (Emory University), Yuri Tschinkel (Courant)
$135,000, DMS0903039, September 2009July 2013

Academic Awards and Fellowships
2008 Nov

CarlitzZippin Thesis Prize
Mathematics Department, University of Pennsylvania

2008 Fall

School of Arts and Sciences Dissertation Completion Fellowship
University of Pennsylvania

20042008

Calabi Fellow
Mathematics Department, University of Pennsylvania

20032004

U.S. Advanced Student Fulbright Grant (France)
Université ParisSud XI Orsay

20022003

Barry M. Goldwater Scholarship
Reed College

20012003

James B. Small Scholarship
Mathematics Department, Reed College

1998

Bronfman Youth Fellowship in Israel

Teaching Awards
2007

School of Arts and Sciences Award for Distinguished Teaching
University of Pennsylvania

2007

Penn Prize for Excellence in Teaching by Graduate Students
University of Pennsylvania

20052007

Good Teaching Award
Mathematics Department, University of Pennsylvania

2017

Stable rationality of quadric and cubic surface bundle fourfolds
(with
Christian
Boehning and Alena Pirutka), submitted (27 pp.)

2017

Failure of the localglobal principle for isotropy of quadratic forms over rational function fields
(with
V. Suresh),
preprint (7 pp.)

2017

Periodindex bounds for arithmetic threefolds
(with
Benjamin Antieau, Colin Ingalls, Daniel Krashen, Max Lieblich), preprint (17 pp.)

2017

Some nonspecial cubic fourfolds
(with
Nick Addington),
preprint (13 pp.)

2016

Conic bundles over threefolds with nontrivial unramified Brauer group
(with
Christian
Boehning, HansChristian Graf von Bothmer, and Alena Pirutka), preprint (37 pp.)

2016

Cycles, derived categories, and rationality
(with Marcello Bernardara),
in Surveys on Recent Developments in Algebraic Geometry, Proceedings
of Symposia in Pure Mathematics, vol. 95, Amer. Math. Soc.,
Providence, RI, 2017, pp. 199266.

2015

Semiorthogonal decompositions and birational geometry of del Pezzo surfaces over arbitrary fields
(with Marcello Bernardara),
accepted for publication
in the Proceedings of the London Mathematical Society (62 pp.)

2015

Azumaya algebras without involution
(with Uriya First and Ben Williams),
accepted in the Journal of the European Mathematical Society (18 pp.)

2016

Universal unramified cohomology of cubic fourfolds containing a plane
(with JeanLouis
ColliotThélène and R. Parimala)
in Brauer Groups and Obstruction Problems: Moduli Spaces and
Arithmetic, Progress in Mathematics, vol. 320, Birkhäuser Basel, 2017,
pp. 2956.

2015

Surjectivity of the total Clifford invariant and Brauer dimension
Journal of Algebra 443 (2015), pp. 395421.

2014

Quadric surface bundles over surfaces,
(with
R. Parimala and
V. Suresh)
Documenta Mathematica, Extra Volume: Alexander S. Merkurjev's Sixtieth
Birthday (2015), pp. 3170.

2014

Cubic fourfolds containing a plane and a quintic del Pezzo surface,
(with
Marcello Bernardara,
Michele
Bolognesi, and
Anthony VárillyAlvarado)
Compositio Algebraic Geometry 1 (2014), issue 2, pp. 181193.

2014

Fibrations in complete intersections of quadrics, Clifford
algebras, derived categories, and rationality problems,
(with
Marcello Bernardara and
Michele
Bolognesi)
Journal de Mathématiques Pures et
Appliquées 102 (2014), issue 1, pp. 249291.

2013

Failure of the localglobal principle for isotropy
of quadratic forms over surfaces
Quadratic Forms and Linear Algebraic Groups, Oberwolfach Reports 10 (2013), issue 2, report 31, pp. 18231825.

2013

The transcendental lattice of the sextic Fermat surface
(with
Christian
Boehning and HansChristian Graf von Bothmer)
Mathematical Research Letters 20 (2013), no. 6, pp. 10171031.

2013

Exceptional collections of line bundles on projective homogeneous varieties,
(with
Alexey Ananyevskiy,
Skip Garibaldi,
and
Kirill Zainoulline)
Advances in Mathematics 236 (2013), pp. 111130.

2013

Vector bundles of rank 4 and A_{3}=D_{3},
International Mathematical Research Notices 2013 (2013), no. 15, pp. 34503476.

2012

Remarks on the Milnor conjecture over schemes,
GaloisTeichmüller Theory and Arithmetic Geometry (Kyoto, 2010),
Advanced Studies in Pure Mathematics 63, 2012, pp. 130

2011

Clifford invariants of line bundlevalued quadratic forms,
MPIM preprint
series 2011 (33), 55 pp.

2011

Open problems on central simple algebras,
(with Eric Brussel,
Skip Garibaldi, Uzi Vishne)
Transformation Groups 16, Issue 1 (2011), pp. 219264.

2017

Brauer Groups and Obstruction Problems: Moduli Spaces and Arithmetic
(with B. Hassett, A. VárillyAlvarado, and B. Viray eds.)
Progress in Mathematics, Volume 320, Birkhäuser Basel, 2017.

2009

Cohomological invariants of line bundlevalued symmetric bilinear
forms
(Ph.D. thesis at the University of Pennsylvania, May 2009) with advisor Ted Chinburg)
(submitted version, or the better single spaced version)

2004

Une démonstration d'un théorème de Bernstein
sur les représentations de
quasicarréintégrable de GL_{n}(F)
où F est un corps local non archimédien
(DEA Thesis, ParisSud Orsay
XI, July 2004), with advisor Guy Henniart
(submitted [PDF])

2003

Volumes of integer polynomials over local fields
(Undergraduate Thesis, Reed College, May 2003), with adviser Joe P. Buhler
(submitted [PDF], with
hiresolution images)

Mentoring
20152017

Senior essay advisor: helped shape an expositional/research project
for two undergraduate math majors at Yale

2015 Mar

Study group leader for graduate students learning about K3 surfaces
during the Arizona
Winter School 2015.

20142016

Coorganized learning seminar for graduate students to prepare for talks in Yale’s Algebraic and Tropical Geometry seminar

2013 Feb

Mock orals chair for graduate student at Courant Institute, New York University

20062008

Member of the Penn Mathematics Department Master TA Program,
responsible for organizing a week long teacher training program in the
Fall and conduct longterm evaluation of incoming graduate students.

2001, 2003

Type II Wildland Firefighter (Squad Boss), Eagle
Pass Reforestation Inc., Jacksonville, OR. Responsible for safety and
personnel management of a 20 person hand crew during summer wildland
fire seasons.

Service/Outreach
2016

Participation in Math Mornings ,
a series of public lectures aimed at middle school students
interested in math. Article
about event, where I am quoted.

201617

Participation in Iota, named for the inclusion map, which is a
group of undergraduate math majors concerned with issues of diversity
and inclusion in the Yale Mathematics Department. Consulted with the
group about the creation of a peertutoring program for upper level
math courses.

2015

Participated in organization of Art of the Equation, exhibition of prints and public lecture with David Mumford at the Yale University Art Gallery. Presented about mathematicians and chalk. Covered in Scientific American Blog and in David Mumford's blog.

2014

Participated in Pathways
to Science Café, a high school science outreach program in New Haven, CT.

20152017

Yale Mathematics Department Algebra Qualifying Exam Board

20142015

Yale Mathematics Department Graduate Admissions Committee (cochair)

20142015

Yale Mathematics Department Website Committee (chair)

2013 Sep

Organized academic jobs information session and panel for graduate
students, Yale University

2011

Zentralblatt MATH reviewer

2009 Jan

Chaired AMS Session on Number Theory, III, at the Joint
Mathematics Meetings, Wednesday, January 7th,
2009, together with Emma Previato.

20072008

Member of a graduate student committee (together with
Andrew Obus and Shea VelaVick)
spearheading the development of an honors calculus course, Math 116/260, to be first
offered at Penn in Fall 2008.

20042008

Bicycle Mechanic Volunteer Facilitator, Neighborhood Bicycle
Works, Philadelphia, PA. A nonprofit educational organization
that seeks to increase opportunities for urban youth through bicycling.

Editorial Work

Referee for Advances in Applied Clifford Algebras, Algebra and Number
Theory, Algebraic Geometry, Journal für die reine und angewandte Mathematik, Geometriae Dedicata, Indian Journal of
Pure and Applied Mathematics, International Mathematics Research
Notices, Journal of Algebraic Geometry, Journal
of Ktheory, Journal of Pure and Applied Algebra, Linear Algebra and
Applications, Mathematische Zeitschrift, Michigan
Mathematical Journal, Pacific Journal of Mathematics, Proceedings of
Edinburgh Mathematical
Society, Proceedings of
the AMS, Research in the Mathematical Sciences, and various conference proceedings volumes.

Graphic Design
Research Seminar Organizing
Conference/Workshop Organizing
2016

Biannual
Algebraic and Tropical Meetings of Brown and YaLE
(BATMOBYLE), Yale University, April 28, 2016, with Angie Cueto, José González, and Sam Payne.

2016

Algebraic Geometry Northeastern Series (AGNES), Yale University, April 810, 2016, with José González and Sam Payne.

2015

Biannual
Algebraic and Tropical Meetings of Brown and YaLE
(BATMOBYLE), Yale University, December 10, 2015, with Angie Cueto, José González, and Sam Payne.

2015

Rational Points on
Varieties, Special Thematic Trimester in Algebraic Geometry, Instituto
Nacional de Matemática Pura e Aplicada (IMPA), Rio de Janeiro,
Brazil, May 2529, 2015, with Cecília Salgado and Anthony
VárillyAlvarado

2015

Special Session on Quadratic Forms in Arithmetic and Geometry, AMS Spring Southeastern Sectional Meeting,
University of Alabama in Huntsville, Huntsville, AL,
March 2729, 2015, with Jorge Morales and Anne QuéguinerMathieu

2014

Biannual
Algebraic and Tropical Meetings of Brown and YaLE
(BATMOBYLE), Yale University, November 20, 2014, with Angie Cueto, José González, Nathan
Kaplan, and Sam Payne.

2014

Special
Session on Exceptional Groups in Physics, Algebra, and
Geometry, AMS Fall Southeastern Sectional Meeting,
University of North Carolina at Greensboro, Greensboro, NC,
November 89, 2014, with Anthony Ruozzi and George McNinch

20142016

The geometry of
Azumaya algebras in dimension 3, SQuaREs (Structured Quartet
Research Ensembles), American Institute
of Mathematics, July 2125, 2014,
with Ben Antieau, Colin Ingalls, Danny Krashen, and Max Lieblich

2013

Brauer groups and obstruction
problems: moduli spaces and arithmetic at American Institute
of Mathematics, Feb 25Mar 1, 2013,
with Brendan Hassett, Tony VárillyAlvarado, and Bianca Viray

2013

AWMAMS Special
Session on The Brauer Group in Algebra and Geometry, Joint
Mathematics Meetings, San Diego, California, January 912, 2013
with Kelly McKinnie
and V. Suresh

2011

Ramification in Algebra and Geometry at Emory University, May 1620 2011,
with Eric Brussel, Skip Garibaldi, Daniel Krashen, and R. Parimala
Funding: DMS1068423, $24,295 (coPI) and NSA conference grant, $14,800 (coPI)

Workshops Attended/Visits
2017

New Trends in Arithmetic and Geometry of Algebraic Surfaces
Banff International Research
Station, Alberta, Canada, March 1217.

2016

AGNES @ UMass Amherst 2016
University of Massachusetts, Amherst, MA, November 46.

2016

Alberta British Columbia (ABC) Algebra Workshop
University of Alberta, Edmonton, Alberta, Canada, October 2931

2016

Interacting Algebraic Geometry
Institute de Mathématiques de Bourgogne, University of Burgundy,
Dijon, France, July 48.

2016

New methods in birational geometry
International Centre for Mathematics and Computer Science (CIMI),
University of Toulouse, France, June 27July 1.

2016

Birational geometry and reduction to positive characteristic
Edge Days, University of Edinburgh, Scotland, UK, June 35.

2016

Geometry over nonclosed fields
Simons Symposium, Schloss Elmau, Bavaria, Germany, April 1723.

2016

AGNES @ Yale University 2016
Yale University, New Haven, CT, April 810.

2016

Unramified cohomology, derived categories, and rationality
FRG MiniWorkshop, University of Utah, Salt Lake City, UT, February 2628.

2015

AGNES @ Brown University 2015
Brown University, Providence, RI, October 24.

2015

LocalGlobal Principles and Their Obstructions
FRG Workshop, University of Pennsylvania, Philadelphia, PA, October 13.

2015

The Use of Linear Algebraic Groups in Geometry and Number Theory
Banff International Research
Station, Alberta, Canada, September 1318.

2015

AMS Summer Institute in Algebraic Geometry
University of Utah, Salt Lake City, UT, July 2731.

2015

Arizona Winter School 2015: Arithmetic and HigherDimensional Varieties
University of Arizona, Tucson, March 1418.

2015

Algebra/Algebraic Geometry Group
University of Michigan, Ann Arbor, February 26, visiting Bill Fulton.

2014

The geometry of
Azumaya algebras in dimension 3
American Institute of Mathematics, Palo Alto, CA, July 2125.

2014

Workshop on Tropical Foundations
Yale Univesity, New Haven, CT, May 1114.

2014

AGNES @ Penn 2014
University of Pennsylvania, Philadelphia, PA, October 31November 2.

2013

Quadratic Forms and Linear Algebraic Groups Worshop
Mathematisches Forschungsinstitut Oberwolfach,
Black Forest, Germany, June 1622.

2013

Spring School and Workshop on Torsors, Motives and Cohomological Invariants
Fields Institute, Toronto, Ontario,
Canada, May 1417.

2013

AGNES @ Yale 2013
Yale University, New Haven, CT, April 1921.

2013

Brauer groups and obstruction problems: moduli spaces and arithmetic
American Institute of Mathematics,
Palo Alto, CA, February 25  March 1.

2012

Arizona
Winter School 2012: Ramification in Geometry
Mathematics Department, University of Arizona, March 1014.

2011

IRMAR algebraic geometry group visitor
Université de Rennes 1,
France, June 1317, visiting Michele Bolognesi.

2011

Institut de Mathématiques de Bordeaux number theory
group (A2X) visiter
Université Bordeaux I, June 610, visiting Philippe CassouNoguès.

2011

Ramification in Algebra
and Geometry
Emory University, Atlanta, GA, May 1620

2011

Forschungsinstitut für Mathematik guest researcher
Eidgenössische Technische
Hochschule, Zürich, Switzerland, May 26, visiting MaxAlbert Knus.

2011

Progrès récents en théorie des modules galoisiens
Centre International de Rencontres Mathématiques, Luminy,
Marseilles, France, March 2125.

2010

RIMSCampStyle Seminar: Galoistheoretic
Arithmetic Geometry,
International Institute for Advanced Studies, Kyoto, Japan, October 1924.

2010

Lens MiniCourse 2010 Linear Algebraic Groups and Quadratic Forms:
Patching, Involutions, and Buildings
Université d'Artois, Lens, France, June 1418.

2010

The
Brauer Group in Israel
Kibbutz Ketura, Israel, January 311.

2009

NonAbelian Fundamental Groups in Arithmetic Geometry Final Workshop,
Isaac Newton Institute for Mathematical Sciences, Cambridge, UK,
December 1418.

2009

Linear
Algebraic Groups and Related Structures
Banff International Research
Station, Alberta, Canada, September 1318 .

2009

Arizona Winter
School 2009: Quadratic Forms
Southwest Center for Arithmetic Geometry, University of Arizona, March
1418. Full funding to attend.

2008

MIMS shortterm visitor
School of Mathematics, University of Manchester, May 7June 6, visiting Martin Taylor

2008

IMB Number Theory Group (A2X) research visiter
Institut de Mathématiques de Bordeaux, Université Bordeaux I, May 1925, visiting Philippe CassouNoguès

2007

Fields Institute Summer School in Iwasawa Theory
Mathematics Department, McMaster University, August 913. Full funding to attend.

2007

Arizona Winter School 2007: padic geometry
Mathematics Department, University of Arizona, March 1014. Full funding to attend.

2006

Clay Mathematics Institute 2006 Summer School: Arithmetic Geometry
Mathematisches Institut, GeorgAugustUniversität, Göttingen, July 17August 11. Full funding to attend.

Talks
2017 Oct

The localglobal dimension spectrum of quadratic forms
Algebraic Geometry Seminar, Courant Institute of Mathematical
Sciences, New York University, New York, NY

2017 Jul

Localglobal principles in number theory and geometry (3 talk lecture series)
ALGAR 2017: Quadratic Forms and LocalGlobal Principles, University of Antwerp, Belgium

2017 Mar

Geometry via counting points
Colloquium, Center for Communications Research, Princeton, NJ

2017 Mar

Decomposition of the diagonal and phantom categories on surfaces
New Trends in Arithmetic and Geometry of Algebraic Surfaces,
Banff International Research Station, Alberta, Canada 
2016 Nov

Stable rationality of conic bundle fourfolds
AGNES Fall 2016,
University of Massachusetts, Amherst, MA

2016 Oct

The torsion order of an algebraic variety
Algebraic Geometry Seminar, University of British Columbia, Vancouver,
Canada

2016 Oct

Stable rationality of conic bundle fourfolds
Alberta British Columbia (ABC) Algebra Workshop
University of Alberta, Edmonton, Alberta, Canada

2016 Oct

Platonic solids and symmetry
Math Mornings (public
outreach lecture series), Yale University, New Haven, CT

2016 Oct

Packing in lattices
Yale Undergraduate Mathematics Society, Yale University, New Haven, CT

2016 Jul

Torsion universal 0cycles on fibrations
Interacting Algebraic Geometry, Institute de Mathématiques de Bourgogne, University of Burgundy,
Dijon, France

2016 Jun

The torsion order of an algebraic variety
New methods in birational geometry, International Centre for Mathematics and Computer Science (CIMI),
University of Toulouse, France

2016 Jun

Stable rationality of some fibrations
Edge Days, Birational geometry and reduction to positive characteristic, University of Edinburgh, Scotland, UK

2016 Jun

BrillNoether theory for cubic fourfolds
Edge Algebra Seminar, University of Edinburgh, Scotland, UK

2016 Apr

Universal triviality of 0cycles and the degeneration method
Algebraic Geometry Seminar, University of Illinois, Chicago, IL

2016 Apr

Stable rationality of quadric bundles
Simons Symposium,
Geometry
over nonclosed fields, Schloss Elmau, Bavaria, Germany
Lecture notes

2016 Mar

Limits of pfaffian cubic fourfolds
Algebraic Geometry Seminar, Courant Institute of Mathematical
Sciences, New York University, New York, NY

2016 Feb

Rationality and 0cycles & 0cycles on cubics (two talk lecture series)
FRG MiniWorkshop, Unramified cohomology, derived categories, and rationality, University of Utah, Salt Lake City, UT

2016 Jan

The rationality problem in algebraic geometry
Colloquium, University of Connecticut, Storrs, CT

2015 Oct

Curves, K3 surfaces, and cubic fourfolds
Algebra Seminar, University of Connecticut, Storrs, CT

2015 Oct

Localglobal obstructions for quadrics over function fields
LocalGlobal
Principles and Their Obstructions, FRG Workshop,
University of Pennsylvania, Philadelphia, PA 
2015 Sep

Algebras of composite degree split by genus one curves
The Use of Linear Algebraic Groups in Geometry and Number Theory,
Banff International Research Station, Alberta, Canada 
2015 Sep

BrillNoether theory for cubic fourfolds
Algebraic and Tropical Geometry Seminar, Yale Univeristy, New Haven, CT

2015 Jul

BrillNoether special cubic fourfolds
AMS Summer Institute in Algebraic Geometry, University of Utah, Salt
Lake City, UT 
2015 Apr

How to take the derivative of the Dirac delta function
Yale Undergraduate Mathematics Society, Yale University, New Haven, CT

2015 Mar

On the Euclidean Division (on behalf of Eva Bayer)
Invited Address, AMS Spring Southeastern Sectional Meeting, University of Alabama in Huntsville, AL

2015 Feb

Pfaffian cubic fourfolds and curves of genus 8
Algebraic Geometry Seminar, Stony Brook University, Stony Brook, NY

2015 Feb

Cycles on cubic fourfolds
Algebraic Geometry Seminar, University of Michigan, Ann Arbor, MI

2015 Feb

Recent upsets in some rationality problems
Colloquium, University of Michigan, Ann Arbor, MI

2014 Oct

Quadratic forms of low dimension
Junior Colloquium, Yale University, New Haven, CT

2014 Oct

Pick's Theorem
Pathways to Science Café, Yale University, New Haven, CT

2014 Sep

Points, lines, and surfaces in cubic fourfolds
Valley Geometry Seminar, University of Massachussetts, Amherst, MA

2014 Sep

The geography of cubic fourfolds
Secret Tropical and Algebraic Geometry Seminar, Yale University, New Haven, CT

2014 Jun

Crab puzzles on lattices
Summer Undergraduate Mathematics Research at Yale (SUMRY) Colloquium, Yale University, New Haven, CT

2014 Apr

Points, lines, and conics
Yale Undergraduate Math Society, Yale University, CT

2014 Mar

Azumaya algebras without involution
Special Session on Galois Cohomology and the Brauer Group, AMS
Southeastern Spring Sectional Meeting, University of Tennessee, Knoxville, TN

2014 Mar

Points and conics
Math Club, University of Connecticut, Storrs, CT

2014 Feb

Central simple algebras in algebra and geometry I/II (series of two talks)
Algebra and Lie Group Seminar, Yale University, New Haven, CT

2014 Jan

The rationality question for cubic fourfolds
Algebra Seminar, University of Connecticut, Storrs, CT

2013 Oct

A game on the exceptional group G_{2} and a conjecture
concerning flag varieties
Algebra Seminar, Wesleyan University, Middletown, CT

2013 Sept

Three approaches to the rationality problem for cubic fourfolds
Algebraic and Tropical Geometry Seminar, Yale University, New Haven, CT

2013 Jun

Failure of the localglobal principle for isotropy of quadratic forms
over surfaces
Quadratic Forms and Linear Algebraic Groups, Oberwolfach, Germany

2013 May

Orthogonal group schemes with simple degeneration
Spring School on Torsors, Fields Institute, Toronto, Ontario, Canada

2013 Apr

Unramified cohomology of cubic fourfolds
Algebraic Geometry Seminar, Courant Institute, New York University,
New York, NY

2013 Apr

Rational cubic fourfolds containing a plane
Algebraic Geometry Seminar, Brown University, Providence, RI

2013 Feb

Cubic fourfolds containing a plane and a quartic scroll
Algebraic Geometry Seminar, Columbia University, New York, NY

2013 Feb

Quaternions over quadratic rings and quaternary quadratic forms
Number Theory Seminar, MIT, Boston, MA

2013 Feb

Introduction to padic Hodge theory (two 1.5 hour talks)
Lucien Szpiro's Impromptu Seminar, CUNY Graduate Center, New York, NY

2013 Feb

Exceptional collections of line bundles on projective homogeneous G_{2}varieties
Algebraic Geometry Seminar, Courant Institute, New York University,
New York, NY

2013 Jan

The anabelian conjectures for proper padic curves (d'après Mochizuki)
Lucien Szpiro's Impromptu Seminar, CUNY Graduate Center, New York, NY

2013 Jan

Quadric surface bundles and quaternion algebras
AMS Special Session on Number Theory and Geometry, Joint Mathematics
Meeting, San Diega, CA

2012 Oct

Nontrivial rational cubic fourfolds containing a plane
Algebra Seminar, University of Pennsylvania, Philadelphia, PA

2012 Sep

Quadric surface bundles and quaternion algebras over surfaces
Algebraic Geometry Seminar, Courant Institute, New York University,
New York, NY

2012 May

Quadric surface bundles over surfaces
Algebra Seminar, University of Pennsylvania, Philadelphia, PA

2012 Mar

Fröhlich twisting via orthogonal motives
Special Session on Hopf Algebras and Galois Module Theory,
2012 Spring Southeastern Section Meeting,
University of South Florida, Tampa,
March 1011

2011 Oct

Rationality of families of intersections of quadrics and derived categories
Algebraic Geometry seminar, Rice University, Houston, TX

2011 Aug

Pascal's rule for vector bundles of rank 4
Algebra and Number Theory seminar, Emory University, Atlanta, GA

2011 Jun

Quadratic forms over curves
Number theory seminar, Technische Universität Dortmund, Germany

2011 Jun

Rationalité des cubiques de dimension quatre et algèbres de Clifford
Algebraic geometry seminar, Université de Rennes 1, France

2011 Jun

Les invariants de CliffordHasseWitt sur les courbes padiques
et les surfaces sur les corps finis
Number theory seminar, Université de Bordeaux 1, France

2011 Jun

Décomposition motivique des quadriques et des espaces homogènes
projectifs
Groupe de travail Géométrie Algébrique et Géométrie Arithmétique
(GAGA), Université de Bordeaux 1, France

2011 June

Zéros des formes quadratiques sur les corps globaux
Séminaire "JouvePazuki", Université de Bordeaux 1, France

2011 Jan

Milnor's conjecture for padic curves
Number theory lunch seminar, MaxPlanckInstitut für
Mathematik, Bonn, Germany

2010 Dec

Decompositions of rank four vector bundles
Oberseminar, Universität
DuisburgEssen, Essen, Germany

2010 Dec

Rank four vector bundles on fourfolds and "exceptional"
isomorphisms of linear algebraic groups
The MAThematics Center
Heidelberg (MATCH), Faculty of Mathematics and Computer Sciences,
Universität Heidelberg, Germany

2010 Nov

Rank four vector bundles on fourfolds
Seminar
Algebraic Geometry (SAG), Universität Bonn, Germany

2010 Oct

A Milnor conjecture for padic curves
RIMSCampStyle seminar Galoistheoretic
Arithmetic Geometry,
International Institute for Advanced Studies, Kyoto, Japan

2010 Oct

A Milnor conjecture for padic curves
Nachwuchskonferenz: Young Researchers in Arithmetic and Algebraic Geometry,
Johannes GutenbergUniversität, Mainz, Germany

2010 Jun

Involutions on Clifford algebras of line bundlevalued quadratic forms
Lens MiniCourse 2010, Université d'Artois, Lens, France

2010 Feb

Chow groups of quadrics I/II (two talks)
Algebra Seminar, Emory University

2010 Jan

(Non)surjectivity of the Clifford invariant
Brauer
Group in Israel, Kibbutz Ketura, Israel

2009 Nov

Essentially selfdual vector bundles on algebraic varieties
Algebraic Geometry Seminar, Duke
University, Durham, NC

2009 Nov

Quaternions and conic sections: from algebra to geometry
Mathematics colloquium Wake Forest University,
WinstonSalem, NC

2009 Oct

Clifford sequences in the theory of line bundlevalued quadratic forms over arithmetic schemes
2009 Fall Southeastern Meeting, Special
Session on Arithmetic Geometry, Boca Raton, FL.

2009 Oct

Invariants of quadratic forms over algebraic varieties
Number Theory Seminar, University of Georgia Athens

2009 Oct

Steenrod squares in Chow groups I/II (two talks)
Algebra Seminar, Emory University

2009 Sep

A Clifford invariant for line bundlevalued quadratic forms
LAG
workshop, Banff International Research
Station, Alberta, Canada.

2009 Sep

Mod 4 invariants of line bundlevalued quadratic forms
Algebra Seminar, Emory University

2009 Jan

Characteristic classes and root numbers for motives associated to
GO_{n}
Joint Mathematics Meetings 2009, Washington, DC

2008 Dec

Characteristic classes for essentially selfdual Galois
representations
Galois Seminar, University of Pennsylvania

2008 Nov

From quaternion algebras to conic sections
Mathematics Colloquium, Reed College

2008 Nov

Cohomological invariants of line bundlevalued quadratic forms
Number Theory Seminar, Mathematics Department, University of California San Diego

2008 Nov

Selfdual Galois representations
Center for Communications Research (CCR) West, La Jolla, CA

2008 May

Invariants «modulo 4» de formes quadratiques à valeurs dans des fibres
Graduate Student Number Theory Seminar, IMB Université Bordeaux I

2008 Mar

Theta divisors and fundamental groups of curves in characteristic p
Galois Seminar, University of Pennsylvania

2008 Feb

Simple Values of Sine and Cosine
Graduate Student Pizza Seminar, University of Pennsylvania

2007 Aug

Iwasawa theory over imaginary quadratic fields
Fields Institute Summer School in Iwasawa Theory, McMaster University

2007 Apr

Orthogonal Galois theoretic characteristic classes I/II (two talks)
Galois Seminar, University of Pennsylvania

2007 Feb

The cosite of modules over a noncommutative ring I/II (two talks)
Graduate Student NonCommutative Algebraic Geometry Seminar, University of Pennsylvania

2006 Nov

Abelian varieties: canonical maps and functorial characterizations
Graduate Student Arithmetic Geometry Seminar, University of Pennsylvania

2006 Oct

Can the automorphism group of an infinite field be so large?
Galois Seminar, University of Pennsylvania

2006 Sep

Abelian varieties over C
Graduate Student Arithmetic Geometry Seminar, University of Pennsylvania

2006 Feb

Fields of moduli of 3point covers with mild reduction,
Galois Seminar, University of Pennsylvania

2005 Oct

An introduction to model theory
Topics Course on Model Theory and Quadratic Forms, University of Pennsylvania

2005 Oct

A generating function of étale algebras over a local field
Graduate Student Pizza Seminar, University of Pennsylvania

2005 Jun

Zapponi's work on the Galois action on diameter four trees I/II (two talks)
Galois Seminar, University of Pennsylvania

2004 Oct

The probability that a padic polynomial splits
Graduate Student Pizza Seminar, University of Pennsylvania

2004 Jan

Expose de courbes elliptiques sur C
Course on Modular Forms and Modular Curves, ParisSud XI Orsay

2002 Dec

padic polynomials
Mathematics Colloquium, Reed College

2002 Oct

Distributions: how to think about the Dirac δfunction
Student Exposition Series, Reed College

2002 Feb

Classifying locally compact topological groups
Student Exposition Series, Reed College

