Roland Púček
Teaching
2023, winter semester
oberseminar: derived categories
(turned into a study group on gerbes)
Kähler geometry
Outline:
(history and making of) varieties, manifolds, schemes, and ringed spaces
local homeomorphisms and surjective submersion as a generalisation of open covers, sheaf theory
descent, stack, Brylisnki-gerbe and the third cohomology class
Murray's bundle gerbe
Outline:
introduction
tensors
exterior derivative, de Rham cohomology
Riemannian volume form and integration
Stokes theorem (Poincare duality)
complex manifolds
complex manifolds: equivalent definitions, cotangent space m/m^2 definition
almost complex structure and equivalent condition of integrability
real vs complex vs holomorphic - functions, vector field and differential forms
Dolbeault cohomology
vector bundles and sheaves
real/complex/holomorphic vector bundles, (hermitian) metrics, connections and curvatures
Cauchy-Rieman operators/pseudo-holomorphic structures
Chern classes
sheaves and Cech cohomology
line bundles and divisors
Kahler and Hermitian manifolds
harmonic theory
Kahler identities
Hodge decomposition
Lefschetz theorems
Ricci form, dd^c-lemma
Kodaira embedding and vanishing theorems, projective manifolds
Kodaira-Serre duality, related results
Calabi-Yau and Aubin-Yau theorems, related results
References:
Brylinski - Loop spaces, characteristic classes, and geometric quantisation
Bunk - Gerbes in geometry, field theory, and quantisation
Murray - (An introduction to) Bundle gerbes
ncatlab.org
stacks.math.columbia.edu/browse
References:
principles of algebraic geometry - Griffits, Harris
Einstein manifolds - Besee
complex geometry - Huybrechts
lectures on Kahler geometry - Moroianu
lectures on Kahler manifolds - Ballmann
a survey of the hodge conjecture - Lewis
2023, summer semester
basic category theory
topics in differential geometry
Outline:
categories, functors, natural transformations
adjoints
Yoneda lemma
limits and adjoints
more limits and Kan extensions
outlook on abelian categories, derived categories and derived functors
Outline:
flat connections
foliations
fundamental groups
universal covering spaces
classification of flat connections
sheaves and sheaf cohomology
References:
Categories for the Working Mathematician - Saunders Mac Lane
Basic Category Theory - Tom Leinster
Algebra I & II - Alexey L. Gorodentsev
References:
Taubes - Differential geometry
2023, winter semester
vector, principal and fibre bundles, connections, and characteristic classes
Outline:
connections and characteristic classes
introductory notions in complex and Kähler geometry, Lefschetz theorem on (1,1)-classes
G-structures
Homework:
categories and functors, tensor products, fibration examples (torus/group invariant), partition of unity, induced metric on tensor bundles, bundle reductions,
References:
Principles of algebraic geometry - Joe Harris and Phillip Griffiths
Differential forms in algebraic topology - Loring W. Tu and Raoul Bott
Differential Geometry: Connections, Curvature, and Characteristic Classes - Loring W. Tu
Fibre Bundles - D. Husemöller
The topology of fibre bundles - Norman Steenrod
Complex Geometry: An Introduction - Daniel Huybrechts
Modern geometry: methods and applications II, III - B.A. Dubrovin, A.T. Fomenko and S.P. Novikov
Hodge theory and complex algebraic geometry I, II - Claire Voisin
Basic bundle theory and K-cohomology invariants - Husemöller, Joachim, Jurčo, Schottenloher
Compact manifolds with special holonomy - Joyce
2022, summer semester
toric symplectic geometry
Outline:
review of Lie group theory and symplectic geometry
Hamiltonian actions
syplectic reduction
Morse theory
Delzant correspondence
References:
Lectures on Symplectic Geometry - Ana Cannas da Silva
Torus Actions on Symplectic Manifolds - Michèle Audin
Introduction to Toric Varieties - William Fulton
Moment Maps and Combinatorial Invariants of Hamiltonian $\mathbb{T}^n$-spaces - Victor Guillemin
Introduction to Symplectic Topology - Dusa McDuff and Dietmar Salamon
Introduction to Smooth Manifolds - John M. Lee
Convexity and commuting Hamiltonians - M.F. Atiyah
Convexity properties of the moment mapping - V. Guillemin and S. Sternberg
Hamiltoniens periodiques et images convexes de l'application moment - T. Delzant
Kähler structures on toric varieties - V. Guillemin
Kähler metrics on toric orbifols - Miguel Abreu
Hamiltonian torus actions on symplectic orbifolds and toric varieties - Eugene Lerman and Susan Tolman