
Speaker: Thorsten SchimannekTitle:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Thorsten Schimannek, CNRSSorbonne Universite Pretalk Speaker: TBA: 10:0010:30 am 

Speaker:Title:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: TBA Pretalk Speaker: TBA: 10:0010:30 am 

Speaker:Title:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: TBA Pretalk Speaker: TBA: 10:0010:30 am 

Speaker: Sheldon KatzTitle:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Sheldon Katz, UIUC Pretalk Speaker: TBA: 10:0010:30 am 

Speaker: Andrew HarderTitle:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Andrew Harder, Lehigh University Pretalk Speaker: TBA: 10:0010:30 am 

Speaker:Title:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: TBA Pretalk Speaker: TBA: 10:0010:30 am 

Speaker:Title:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: TBA Pretalk Speaker: TBA: 10:0010:30 am 

Speaker:Title:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: TBA Pretalk Speaker: TBA: 10:0010:30 am 

Speaker: David FaveroTitle:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: David Favero, University of Minnesota Pretalk Speaker: TBA: 10:0010:30 am 

Speaker: Dori BejleriTitle: Moduli of boundary polarized CalabiYau pairsVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Pretalk Speaker: Rosie Shen (Harvard): 10:0010:30 am Pretalk Title: Introduction to the singularities of the MMP Speaker: Dori Bejleri (Harvard Math & CMSA) Title: Moduli of boundary polarized CalabiYau pairs Abstract: The theories of KSBA stability and Kstability furnish compact moduli spaces of general type pairs and Fano pairs respectively. However, much less is known about the moduli theory of CalabiYau pairs. In this talk I will present an approach to constructing a moduli space of CalabiYau pairs which should interpolate between KSBA and Kstable moduli via wallcrossing. I will explain how this approach can be used to construct projective moduli spaces of plane curve pairs. This is based on joint work… 

Speaker: Kai XuTitle:Venue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Kai Xu, CMSA Pretalk Speaker: TBA: 10:0010:30 am 

Speaker: Damian van de HeisteegTitle: Species Scale across String Moduli SpacesVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Pretalk Speaker: David Wu (Harvard Physics): 10:0010:30 am Speaker: Damian van de Heisteeg, CMSA Title: Species Scale across String Moduli Spaces Abstract: String theories feature a wide array of moduli spaces. We propose that the energy cutoff scale of these theories – the socalled species scale – can be determined through highercurvature corrections. This species scale varies with the moduli; we use it both asymptotically to bound the diameter of the field space, as well as in the interior to determine a “desert point” where it is maximized. 

Speaker: Oliver SchlottererTitle: Modular graph forms and iterated integrals in string amplitudesVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Oliver Schlotterer (Uppsala University) Title: Modular graph forms and iterated integrals in string amplitudes Abstract: I will discuss string amplitudes as a laboratory for special functions and period integrals that drive fruitful crosstalk with particle physicists and mathematicians. At genus zero, integration over punctures on a disk or sphere worldsheet generates multiple zeta values in the lowenergy expansion of open and closedstring amplitudes. At genus one, closedstring amplitudes introduce infinite families of nonholomorphic modular forms through the integration over torus punctures known as modular graph forms. The latter inspired Francis Brown’s alternative construction of nonholomorphic modular forms in the mathematics literature via iterated integrals, and I will report on recent progress… 

Speaker: ChungMing PanTitle: KählerEinstein metrics on families of Fano varietiesVenue: CMSA Room G02Algebraic Geometry in String Theory Seminar Speaker: ChungMing Pan, Institut de Mathématiques de Toulouse Title: KählerEinstein metrics on families of Fano varieties Abstract: This talk aims to introduce a pluripotential approach to study uniform a priori estimates of KählerEinstein (KE) metrics on families of Fano varieties. I will first recall basic tools in the pluripotential theory and the variational approach to complex MongeAmpère equations. I will then define a notion of convergence of quasiplurisubharmonic functions in families of normal varieties and extend several classical properties under this context. Last, I will explain how these elements help to obtain a purely analytic proof of the openness of existing singular KE metrics and a uniform $L^\infty$ estimate of KE potentials. This… 

Speaker: ChaoMing LinTitle: On the convexity of general inverse $\sigma_k$ equations and some applicationsVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: ChaoMing Lin (University of California, Irvine) Title: On the convexity of general inverse $\sigma_k$ equations and some applications Abstract: In this talk, I will show my recent work on general inverse $\sigma_k$ equations and the deformed HermitianYangMills equation (hereinafter the dHYM equation). First, I will show my recent results. This result states that if a level set of a general inverse $\sigma_k$ equation (after translation if needed) is contained in the positive orthant, then this level set is convex. As an application, this result justifies the convexity of the MongeAmpère equation, the Jequation, the dHYM equation, the special Lagrangian equation, etc. Second, I will introduce some semialgebraic sets and a special… 

Speaker: Ahsan KhanTitle: 2Categories and the Massive 3d AModelVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Ahsan Khan, IAS Title: 2Categories and the Massive 3d AModel Abstract: I will outline the construction of a 2category associated to a hyperKahler moment map. The construction is based on partial differential equations in one, two, and three dimensions combined with a threedimensional version of the GaiottoMooreWitten web formalism. 

Speaker: Nicolo PiazzalungaTitle: The index of MtheoryVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Nicolo Piazzalunga, Rutgers Title: The index of Mtheory Abstract: I’ll introduce the higherrank DonaldsonThomas theory for toric CalabiYau threefolds, within the setting of equivariant Ktheory. I’ll present a factorization conjecture motivated by Physics. As a byproduct, I’ll discuss some novel properties of equivariant volumes, as well as their generalizations to the genuszero GromovWitten theory of noncompact toric varieties. 

Speaker: Daniel PomerleanoTitle: Singularities of the quantum connection on a Fano varietyVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Daniel Pomerleano, UMass Boston Title: Singularities of the quantum connection on a Fano variety Abstract: The small quantum connection on a Fano variety is one of the simplest objects in enumerative geometry. Nevertheless, it is the subject of farreaching conjectures known as the Dubrovin/Gamma conjectures. Traditionally, these conjectures are made for manifolds with semisimple quantum cohomology or more generally for Fano manifolds whose quantum connection is of unramified exponential type at q=\infty. I will explain a program, joint with Paul Seidel, to show that this unramified exponential type property holds for all Fano manifolds M carrying a smooth anticanonical divisor D. The basic idea of our argument is to view these structures through… 

Speaker: Sam BardwellEvansTitle: Scattering Diagrams from Holomorphic Discs in Log CalabiYau SurfacesVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Sam BardwellEvans, Boston University Title: Scattering Diagrams from Holomorphic Discs in Log CalabiYau Surfaces Abstract: In this talk, we construct special Lagrangian fibrations for log CalabiYau surfaces and scattering diagrams from Lagrangian Floer theory of the fibers. These scattering diagrams recover the algebrogeometric scattering diagrams of GrossPandharipandeSiebert and GrossHackingKeel. The argument relies on a holomorphic/tropical disc correspondence to control the behavior of holomorphic discs, allowing us to relate open GromovWitten invariants to log GromovWitten invariants. This talk is based on joint work with ManWai Mandy Cheung, Hansol Hong, and YuShen Lin. 

Speaker: Mauricio RomoTitle: GLSM, Homological projective duality and nc resolutionsVenue: CMSA Room G10Algebraic Geometry in String Theory Seminar Speaker: Mauricio Romo, Tsinghua University Title: GLSM, Homological projective duality and nc resolutions Abstract: Kuznetsov’s Homological projective duality (HPD) in algebraic geometry is a powerful theorem that allows to extract information about semiorthogonal decompositions of derived categories of certain varieties. I will give a GLSMs perspective based on categories of Bbranes. I will focus mostly on the case of Fano (hypersurfaces) manifolds. In general, for such cases the HPD can be interpreted as a noncommutative (nc) resolution of a compact variety. I will give a physical interpretation of this fact and present some conjectures. 