Cotangent cohomology of rational surface singularities

Cotangent cohomology of Stanley-Reisner rings

Countability properties of some Berkovich spaces

Counter-example to global Torelli problem for irreducible symplectic manifolds

Counter-examples of high Clifford index to Prym-Torelli

Counterexample to the Hodge Conjecture

Counterexamples to the Kawamata-Viehweg Vanishing on Ruled Surfaces in Positive Characteristic

Counting Bitangents with Stable Maps

Counting Bundles

Counting conics in complete intersections

Counting curves of any genus on P^2_6

Counting curves of any genus on P^2_7

Counting curves of any genus on rational ruled surfaces

Counting curves on surfaces: a guide to new techniques and results

Counting curves via degeneration

Counting curves via lattice paths in polygons

Counting curves which move with threefolds

Counting generic genus-0 curves on Hirzebruch surfaces

Counting Hyperelliptic curves on Abelian surfaces with Quasi-modular forms

Counting invariant of perverse coherent sheaves and its wall-crossing