Konstantin Feldman

Paper stuff...

• Miraculous cancellation and Pick's theorem.
• Boundary effects in non-uniform spin chains.
• Exact diagonalization of the XY-Hamiltonian of open linear chains with periodic coupling constants and its application.
• Functional equations and the generalised elliptic genus.
• Chern numbers of Chern submanifolds.
• Hirzebruch genera of manifolds supporting a Hamiltonian circle action.
• An equivariant analogue of the Poincaré–Hopf theorem.
• The index of an equivariant vector field, and addition theorems for Pontryagin characteristic classes.
• A new proof of the Frobenius conjecture on the dimensions of real algebras without zero divisors.
• An addition formula for the first half-integer Pontryagin class in complex cobordisms.

ExtraMaths4Fun

• Mathematical knacks.
• Isometries.

Cobordism

Bordism (from urban dictionary ) - complete and utter boredom, a state in which you're sitting there falling asleep when you're wide awake. I do cobordism, it is more fun - you can multiply there.