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# Seminar in Real & Complex Geometry

Important announcements:
(1) As from 2020 the seminar moved to online format (in zoom)

(2) The seminar is registered at researchseminars.org (beta)

(3) To receive an announcement and zoom link and/or join the mailing list write to
Eugenii Shustin (shustin@tauex.tau.ac.il) or Sara Tukachinsky (sarabt1@gmail.com)

(4) For the links to video recordings ask
Eugenii Shustin (shustin@tauex.tau.ac.il)

## Next session

December 8, 2022, --
Eugenii Shustin (Tel Aviv University)
"Refined tropical enumerative invariants"
## Future sessions

December 22, 2022, --
Dmitry Kerner (Ben-Gurion University)
TBA
January 19, 2022, --
Lothar Göttsche (ICTP, Trieste)
TBA
## Past sessions

November 24, 2022, --
Kai Hugtenburg (University of Edinburgh)
"Gromov-Witten theory: some computational tools"
November 10, 2022, --
Grigory Mikhalkin (University of Geneve)
"Tropical, real and symplectic geometry"
October 27, 2022, --
Eugenii Shustin (Tel Aviv)
"Introduction to tropical geometry"
(
Slides)
June 9, 2022, --
Amanda Hirschi (Cambridge)
"A construction of global Kuranishi charts for Gromov-Witten moduli spaces of
arbitrary genus"
(
Slides)
May 26, 2022, --
Chiu-Chu Melissa Liu (Columbia University)
"Higgs-Coulomb correspondence for abelian gauged linear sigma models"
(
Slides)
May 12, 2022, --
Sourav Das (University of Haifa)
"Higgs bundles on nodal curves"
(
Slides)
April 28, 2022, --
Shaoyun Bai (Princeton University)
"Integral counterpart of Gromov-Witten invariants"
(
Slides)
April 7, 2022, --
Rahul Pandharipande (ETH)
"Log intersection theory of the moduli space of curves"
(
Slides)
March 31, 2022, --
Vivek Shende (Centre for Quantum Mathematics at Syddansk Universitet
& University of California, Berkeley)
"Skein valued curve counting and quantum mirror symmetry for the conifold"
March 10, 2022, --
Yelena Mandelshtam (University of California, Berkeley)
"Curves, degenerations, and Hirota varieties"
(
Slides)
March 3, 2022, --
Marvin Anas Hahn (Institut de Mathématiques Jussieu, Sorbonne Université)
"Intersecting psi-classes on tropical Hassett spaces"
February 24, 2022, --
Kris Shaw (University of Oslo)
"A tropical approach to the enriched count of bitangents to quartic curves"
January 27, 2022, --
Thomas Blomme (Université de Genève)
"Enumeration of tropical curves in abelian surfaces"
(
Slides)
January 13, 2022, --
Viatcheslav Kharlamov (Université de Strasbourg)
"On surgery invariant counts in real algebraic geometry"
January 6, 2022, --
Michael Polyak (Technion)
"Refined tropical counting, ribbon structures and the quantum torus"
December 16, 2021, --
Roberto Rubio (Universitat de Barcelona)
Generalized complex geometry and three-manifolds
(
Slides)
December 9, 2021, --
Dan Abramovich (Brown University)
"Punctured logarithmic maps"
(
Slides)
December 2, 2021, --
Michele Stecconi (Université de Nantes)
"Semicontinuity of Betti numbers and singular sets"
(
Slides)
November 18, 2021, --
Penka Georgieva (Institut de Mathématiques de Jussieu)
"Higher-genus real/open counts in dimension 2"
November 4, 2021, --
Pierrick Bousseau (Université Paris-Saclay)
"Gromov-Witten theory of complete intersections"
(
Slides)
October 21, 2021, --
Erwan Brugallé (Université de Nantes)
"Euler characteristic and signature of real semi-stable degenerations"
August 12, 2021, --
Dmitry Kerner (Ben-Gurion University)
"Germs of maps, group actions and large modules inside group orbits"
(
Slides)
July 15, 2021, --
Khazhgali Kozhasov (Universität Osnabrück)
"Nodes on quintic spectrahedra"
(
Slides)
July 8, 2021, --
Dmitry Kerner (Ben-Gurion University)
"Block-diagonal reduction of matrices over commutative rings. Decomposition of
(sheaves of) modules vs decomposition of their support"
(
Slides)
June 17, 2021, --
Lev Radzivilovsky (Tel Aviv University)
"Enumeration of rational surfaces and moduli spaces of configurations of points in the
projective plane"
(
Slides)
April 29, 2021, --
Ilya Tyomkin (Ben-Gurion University)
"On (ir)reducibility of Severi varieties on toric surfaces"
March 18, 2021, --
Olivier Benoist (École normale supérieure, Paris)
"Rational curves on real algebraic varieties"
March 11, 2021, --
Olivier de Gaay Fortman (École normale supérieure, Paris)
"Real Noether-Lefschetz loci and density of non-simple abelian varieties over the real
numbers"
November 26, 2020, --
Michele Ancona (Tel Aviv University)
"Exponential rarefaction of maximal hypersurfaces"
November 12, 2020, --
Arielle Leitner (Weizmann Institute of Science)
"Deformations of Generalized Cusps on Convex Projective Manifolds"
(
Slides,
Appendix)
November 5, 2020, --
Thomas Blomme (Université de Neuchâtel)
"Refined count of rational tropical curves in arbitrary dimension"
(
Slides)
October 29, 2020, --
Stepan Orevkov (Steklov Math. Institute and Université Paul Sabatier, Toulouse)
"On real algebraic and real pseudoholomorphic curves in $RP^2$"
(
Slides)
October 22, 2020, --
Charles Arnal (Institut de Mathématiques de Jussieu - Paris Rive Gauche)
"Families of real projective algebraic hypersurfaces with large asymptotic Betti
numbers"
(
Slides)
May 25, 2020, --
Boulos El Hilany (Johannes Radon Institute for Computational and Applied Mathematics, Linz)
"Counting isolated points outside the image of a polynomial map"
(
Slides)
May 11, 2020, --
Ethan Cotterill (Universidade Federal Fluminense, Brasil)
"Rational curves with hyperelliptic singularities"
(
Slides)
April 27, 2020, --
Hulya Argüz (Université de Versailles, France)
"Tropical enumeration of real log curves in toric varieties"
(
Slides)
April 6, 2020, --
Xiang He (The Hebrew University)
"On the Severi problem with point constraints"
(
Slides)
March 9, 2020, --
Guillaume Tahar (Weizmann)
"Meromorphic differentials with prescribed singularities: a refinement of a classical
Mittag-Leffler theorem"
February 18, 2020, --
Andriy Regeta (University of Jena)
"Is an affine spherical variety determined by its automorphism group?"
February 13, 2020, --
Dmitry Kerner (Ben-Gurion University)
"Surjectivity of the completion map for rings of C^\infty-functions, necessary and
sufficient conditions"
January 30, 2020, --
Shachar Carmeli (Weizmann)
"A relative de Rham theorem for Nash submersions"
January 2, 2020, --
Mikhail Katz (Bar Ilan)
"A geometric inequality for length and volume in complex projective plane"
November 28, 2019, --
Meirav Topol (SCE)
"Classification of algebraic curves and surfaces: topological methods and invariants"
(
Slides)
November 14, 2019, --
Michele Ancona (Tel Aviv University)
"Random sections of line bundles over real algebraic curves"
October 31, 2019, --
Karl Christ (Ben-Gurion University)
"On irreducibility of Severi varieties of toric surfaces"
June 6, 2019, --
Madeline Brandt (Berkeley)
"Symmetric powers of algebraic and tropical curves"
and
Madeleine Weinstein (Berkeley)
"Voronoi Cells of Varieties"
May 16, 2019, --
Oliver Lorscheid (IMPA, Brazil)
"Tropical geometry over the tropical hyperfield"
April 11, 2019, --
Shir Peleg (Tel Aviv University)
"Sylvester-Gallai type theorem for quadratic polynomials"
March 28, 2019, --
Viatcheslav Kharlamov (Université de Strasbourg)
"Deformation chirality of real cubic fourfolds"
March 14, 2019, --
Aziz Kharoof (Haifa University)
"Higher order Toda brackets"
(
Slides)
March 7, 2019, --
Dmitry Kerner (Ben-Gurion University)
"Tjurina modules for matrix singularities, finite determinacy, new
singularity ideals"
December 13, 2018, --
Eli Shamovich (University of Waterloo)
"Hyperbolic varieties, real fibered morphisms, and Ulrich sheaves"
December 6, 2018, --
Shachar Carmeli (Weizmann Institute)
"Ambidexterity in Chromatic Homotopy Theory"
November 29, 2018, --
Jonatan Kogan (Tel Aviv & Haifa)
"Introduction to Toda brackets and secondary operations"
(
Slides)
November 8, 2018, --
Lev Radzivilovsky (Tel Aviv)
"Counting surfaces singular along a line in $\PP^3$"
October 24, 2018, --
Mikhail Borovoi (Tel Aviv)
"Real models of spherical homogeneous spaces"
February 22, 2018, --
Andrés Jaramillo (Tel Aviv)
"Trigonal morsifications on Hirzebruch Surfaces"
February 1, 2018, --
Michael Polyak (Technion)
"Pseudo-tropical curves"
January 4, 2018, --
Michael Farber (Queen Mary, University of London, & IAS, Hebrew University)
"Robot motion planning and Bredon equivariant cohomology"
December 28, 2017, --
Dmitry Kerner (Ben Gurion University)
"Group actions on modules, large orbits and finite determinacy"
December 7, 2017, --
Giuliano Gagliardi (Tel Aviv)
"The Luna-Vust theory of spherical embeddings (continuation)"
November 30, 2017, --
Giuliano Gagliardi (Tel Aviv)
"The Luna-Vust theory of spherical embeddings"
November 23, 2017, --
Mikhail Borovoi (Tel Aviv)
"Spherical varieties: combinatorial invariants of spherical homogeneous
spaces"
November 16, 2017, --
Andrés Jaramillo (Tel Aviv)
"Rigid isotopies of degree 5 nodal rational curves in \mathbb{RP}^2"
(
Slides)
November 9, 2017, --
Ran Tessler (ETH, Zürich)
"Open (CP^1,RP^1) intersection
theory and open Gromov-Witten/Hurwitz corrspondence"
November 2, 2017, --
Boaz Elazar (Weizmann Institute)
"Schwartz Functions On Algebraic And QN Varieties"
June 12, 2017, --
Zur Izhakian (University of Aberdeen)
"Tropical plactic algebra and semigroup representations"
May 8, 2017, --
Lev Radzivilovsky (Tel Aviv University)
"Chow quotient"
April 24, 2017, --
Peter Leviant (Tel Aviv University)
"Morsifications of real plane curve singularities"
April 3, 2017, --
Ilia Itenberg (Université Paris 6)
"Tropical homology"
April 3, 2017, --
Izzet Coskun (University of Illinois at Chicago)
"Birational geometry of moduli spaces of sheaves on surfaces"
March 20, 2017, --
Lev Blechman (Tel Aviv University)
"Refined descendant Gromov-Witten Invariants"
March 13, 2017, --
Lev Blechman (Tel Aviv University)
"Introduction to tropical enumerative geometry"
January 12, 2017, --
Mikhail Borovoi (Tel Aviv University)
"Reeder 's puzzle and orbits in real homogeneous spaces"
December 22, 2016, --
Amnon Yekutieli (Ben Gurion University)
"The Derived Category of Sheaves of Commutative DG Rings"
(Slides)
November 16, 2016, --
Mikhail Borovoi (Tel Aviv University)
"Cayley groups"
November 9, 2016, --
Hélène Esnault (Freie Universität Berlin)
"D-modules and finite monodromy"
(Slides)
June 14, 2016, --
Ziv Ran (University of California at Riverside)
"Generic projections"
June 6, 2016, --
Moshe Klein (Tel Aviv)
"The 0 Axis and the Fifth Dimension"
May 31, 2016, --
Askold Khovanskii (University of Toronto)
"Newton polyhedra and components of complete
intersections"
(Slides)
October 8, 2015, --
Sergey Natanzon (High School of Economics)
"2D Toda hierarchy, Hurwitz numbers and Riemann theorem"
July 22, 2015, --
Mikhail Verbitsky (High School of Economics)
"Teichmuller space of symplectic structures"
(Slides)
July 21, 2015, --
Mikhail Verbitsky (High School of Economics)
"Proof of Morrison-Kawamata cone conjecture for hyperkahler manifolds"
(Slides)
May 13, 2015, --
Victor Kulikov (Steklov Mathematical Institute)
"Plane rational quartics and $K3$ surfaces"
April 15, 2015, --
Shachar Carmeli (Weizmann Institute)
"On the stability and Gelfand property of symmetric pairs"
March 26, 2015, --
Hannah Markwig (Universitaet des Saarlandes)
"Repairing tropicalizations of plane curves with modifications"
March 19, 2015, --
Victor Batyrev (Universitaet Tuebingen)
"Nonarchimedean integration over spherical varieties"
January 22, 2015, --
Yoav Len (Yale University)
"Tropical plane quartics"
November 13, 2014, --
Emmanuel Opshtein (Universite de Strasbourg)
"Singularities of pseudo-holomorphic curves and symplectic embeddings in
CP^2"
October 30, 2014, --
Victor Kulikov (Steklov Institute)
"Numerically pluricanonical cyclic coverings"
October 23, 2014, --
Dmitry Kerner (Ben-Gurion University)
"Finite determinacy of matrices"
September 17, 2014, --
Alex Isaev (Australian National University)
"On the CR-embeddability of a family of real hypersurfaces in an
n-dimensional complex affine quadric into complex Euclidean n-space. Proper group actions in complex geometry"
(Slides)
June 12, 2014, --
Karol Palka (University of Warsaw)
"On the log Minimal Model Program in dimension two and its application to the
Coolidge-Nagata problem"
June 5, 2014, --
Dmitry Kerner (Ben-Gurion) "A strong version of implicit function theorem"
February 26, 2014, --
Pinaki Mondal (Weizmann Institute) "Towards a constructive theory of
compactifications of $C^n$"
January 16, 2014, --
Amnon Yekutieli (Ben-Gurion University)
"Duality and Tilting for Commutative DG Rings"
January 9, 2014, --
Alfred Inselberg (Tel Aviv University)
"Representing hypersurfaces in parallel coordinates"
December 26, 2013, --
Alfred Inselberg (Tel Aviv University)
"On the representation of hyperplanes in parallel coordinates"
December 5, 2013, --
Oren Ben-Bassat (University of Oxford / University of Haifa)
"Analytic Geometry As Relative Algebraic Geometry"
November 6, 2013, --
Stepan Orevkov (Steklov Institute)
"Algorithmic recognition of quasipositive braids of algebraic length two"
October 9, 2013, --
Franziska Schroeter (Saarbruecken)
"Refined Broccoli invariants"
August 4, 2013, --
Tal Perri (Bar-Ilan)
"Algebraic aspects in tropical mathematics"
July 15, 2013, --
Misha Verbitsky (High School of Economics, Moscow)
"Ergodic complex structures"
(Slides)
July 11, 2013, --
Misha Verbitsky (High School of Economics, Moscow)
"Global Torelli theorem for hyperkaehler manifolds"
(Slides)
April 18, 2013, --
Pinaki Mondal (Weizmann Institute) "Degree-like functions in complex and real algebraic
geometry"
April 11, 2013, --
Dmitry Kerner (Ben Gurion) "Matrices over local rings: criteria for
decomposability or being an extension"
February 28, 2013, --
Liran Shaul (Weizmann) "Rigid dualizing complexes over commutative adic rings"
February 7, 2013, --
Soli Vishkautsan (Bar Ilan) "Residual periodicity on algebraic varieties"
January 24, 2013, --
Lev Radzivilovsky (Tel Aviv) "Rational curves on the compactified moduli space of
rational curves with marked points"
January 17, 2013, --
Bernd Sturmfels (Berkeley) "Non-negative polynomials versus sums of squares"
(Slides)
December 20, 2012, --
Amnon Yekutieli (Beer Sheva) "Residues and duality for schemes and stacks"
(Slides)
December 13, 2012, --
Dmitry Kerner (Beer Sheva) "Degenerations of projective curves"
December 6, 2012, --
Pinaki Mondal (Weizmann) "An effective criterion for algebraic contraction of
curves"
November 8, 2012, --
Dmitry Kerner (Beer Sheva) "On finite determinacy"
November 1, 2012, --
Franziska Schroeter (Saarbruecken) "Broccoli curves of genus 0 and maybe 1"
(Slides)
June 5, 2012, --
Michael Bialy (Tel Aviv) "Hopf rigidity for convex billiards on Hemisphere
and Hyperbolic plane"
May 30, 2012, --
Jiuzu Hong (Tel Aviv) "Polynomial functors and categorifications"
May 29, 2012, --
Jonathan Wahl (North Carolina) "Singular points of complex
surfaces---geometry and smoothing"
May 22, 2012, --
A. Kanel-Belov (Bar Ilan) "Polynomial automorphisms and Jacobian conjecture"
May 14, 2012, --
O. Ben-Bassat (Haifa) "Sub-varieties and Descent"
May 8, 2012, --
Vic. Kulikov (Moscow) "Covering semigroups"
March 20, 2012, --
E. Shustin (TAU) "Welschinger invariants from an algebraic geometry
point of view (continuation)"
March 19, 2012, --
D. Kerner (Toronto) "Discriminant of transversal singularity type"
March 13, 2012, --
E. Shustin (TAU) "Welschinger invariants from an algebraic geometry
point of view"