Central european seminar
Central European Seminar is a semi-periodic event devoted to Differential Geometry initiated by Peter Michor about 20 years ago. From a small seminar of a group of geometers in Vienna and Brno (notably Ivan Kolar, Peter Michor, their students and some more) this event has evolved to a vital meeting point of many geometers in particular from Vienna, Brno, and Prague. The representative contact persons involve Andreas Cap, Jan Slovak, Vladimir Soucek.

## Brno, April 2012:

 I. Chrysikos Spin structures on flag manifolds C. Zanet Generic 4-distributions D. Alekseevsky Cohomogenity 1 G-manifolds with invariant Kahler or Kahler-Einstein structures

## CES - AmeGA Workshop in Telc, 21 - 22 October 2011:

 Friday: Plenary lectures D.Schnabl Survey on string theory J.Stovicek Grothedieck duality and derived categories Seminar (algebra and geometry & physics separately) Geometry & physics section P.Michor Vanishing geodesic distance for Sobolev metrics $H^s$ for $1 \leq s \leq 1/2$ on diffeomorphism groups B.Kruglikov Advances in Tanaka theory and applications J.Neretin Multimetric spectral problems and symmetric spaces O.Kowalski functions on one complex variable and special hypersurfaces in $\mathbb{R}^4$ J.Vanzura Locally conformally symplectic structures Algebra section J.Trlifaj Locality of restricted Drifeld vector bundles M.Makkai The Gray category of locally finitely presentable 2-categories J.Bourke Pie algebras in 2-categories S.Pospisil (Co)tilting classes over commutative noetherian rings O.Raventos Models for mapping spaces L.Vokrinek What do homotopy colimits satisfy?
 Saturday: Plenary lectures D.Alekseevski Neurogeometry Seminar (algebra and geometry & physics separately) Geometry & physics section A.Galaev Sim-holonomy and the Einstein equation M.Lyulinskiy Building supersymmetric metric in superspace T.Milev On branching laws of generalized Verma $\frak{so}(7)$-modules over $G_2$. J.Gregorovic Local reflection spaces M.Doubek Deformation of (curved) $A_\infty$ algebras J.Vysoky Lie lagebroid perspective of Poisson-Lie sigma models E.Tanaka Einstein's general relativity in terms of Kawaguchi geometry (areal space) T.Salac Existence of global $3$-forms on manifolds of dimension 7 Algebra section D.Chikhladze Enriched regular categories M.Korbelar Commuting elements in free solvable groups J.Rodicky Class-accessible categories

## CES - AmeGA Workshop in Radejov, 13 - 14 May 2011:

 Friday: Plenary lectures D.Alekseevski Almost Sasakian and para-Sasakian special geometries M.Makkai Higher dimensional categories Seminar (algebra and geometry separately) Geometry section A.Galaev Two-symmetric Lorentzian manifolds T.Willse Nurowski's conformal structure and split G_2-holonomy Z.Vlasakova Symmetries of the CR-sub-Laplacian Algebra section J.Bourke Homotopy invariants and 2-categories A.stantulescu Cocategorial intervals in monoidal model categories L.Vokrinek Absolute homotopy colimits
 Saturday: Plenary lectures L.Schwachhofer Pluricomplex geometry and hyperbolic monopoles J.Rosicky Enriched categories M.Marvan Conditions for formal integrability

## Mikulov, 19 - 20 Nov 2010:

ECC Meeting in Mikulov
 Friday: O.Kowalski Some generalised symmetric spaces after 36 yers L.Schwachhofer Extrinsic symmetric spaces S.Armstrong Collasping $S^n$ products: singular points of decomposable conformal holonomy M.Hammerl Holonomy reduction of Cartan geometries A.Cap On normal solutions of firts BGG operators T.Milev Root formula - Kac subalgebras of finite type B.Jurco Non-abelian bundle gerbes and strings
 Saturday: D.Saunders Where do lower order Euler-Lagrange equations come from ? L.Krizka Riemannian-Hilbert correspondence for algebroid connections A.Galaev Decomposition fo the covariant derivative of the curvature tensor of a pseudo-Kahlerian manifold S.Krysl Twisted complexes Z.Vlasakova Symmetris of CR sub-Laplacian

## Brno, June 2010:

 A.Galaev On one part of the Lorentzian curvature tensor Van Le Hong Geometry & computentional complexity S.Verpoort Equi-affine curvature theory S.Krysl Hodge theory of symplectic manifolds L.Zalabova Symmetries of parabolic contact structures

## Mikulov, 29 - 30 May 2009:

ECC Meeting in Mikulov

## Brno, 30 May 2008:

 S.Amstrong I: Cone constructions for Grassmannian structures T.Salac Casimir operators V.Soucek On Verma modules homomorphisms S.Amstrong II: 6-dimensional distributions on a 9-dimensional manifold A.Cap On symplectic holonomies

## Brno, 14 Mar 2008:

 Van Le Hong Isolation phenomena V. Souèek Normalizations suitable for prolongation procedures S. Armstrong Examples of non-exceptional 2-graded geometries A. Cap Compact examples of holonomies from |1|-graded algebra B. Doubrov Distributions of dimensions two and three J. Slovák On the free distributions

## Brno, 14 Dec 2007:

 S. Armstrong Non-regular 2-graded parabolic geometries and some other zero-homogeneity parabolic geometry, including those with \kappa_0 M. Hammerl A natural deformation of tractor conections P. Somberg On Juhl's conjectures and homomorphisms of generalized Verma modules

## Brno, 12 Oct 2007:

 S. Gelbart On Langlands' Notions of an Automorphic Form J. Silhan Commuting linear operators and algebraic decompositions A. Cap, V. Soucek Curved Casimir Operators I, II

## Brno, 1 June 2007:

 S. Armstrong On the Courant bracket on tractor bundles S. Krysl On the symplectic Dirac operator A. Damiano GL(k) invariants and Dirac operator in several variables ("joggling with Young diagrams") M. Krbek Iwasawa decomposition of Lorentz algebra A. Cap Rigidity of hermitean symmetric space - origin of the problem

## Brno, 20 April 2007:

 S. Krysl Relation of spectra of symplectic Dirac and Rarita-Schwinger operator A. Galaev Holonomy of supermanifolds J. Janyska Structures on odd dimensional manifolds S. Armstrong Generalized Einstein condition for parabolic geometries J. Silhan On the splitting operators in parabolic geometries

## Brno, 16 March 2007:

 P. Michor Neretin Geodesics leading to computable geodesic distance in vision P. Franek Multivariable Dirac operator S. Armstrong Holonomy of conformal, projective and related structures

## Brno, 13 October 2006:

 J. Silhan Conformal Killing equation on forms L. Vokrinek Interpolation of smooth manifolds V. Soucek Higher symmetries of the Dirac operator A. Cap Characterization of Fefferman spaces