Lectures on Poisson groupoids

$\beta$--family congruences and the $f$--invariant

An overview of abelian varieties in homotopy theory

The spectra $ko$ and $ku$ are not Thom spectra: \\an approach using THH

Sub-Hopf algebras of the Steenrod algebra and the Singer transfer

On configuration space integrals for links

The work of Fred Cohen

Open string instantons and relative stable morphisms

On the Heegaard splittings of amalgamated 3--manifolds

Simplicial moves on complexes and manifolds

Fermat limit and congruence of Ohtsuki invariants

Open book decompositions versus prime factorizations of closed, oriented 3-manifolds

Enumerative geometry of stable maps with Lagrangian boundary conditions and multiple covers of the disc

Formulae of one-partition and two-partition Hodge integrals

Order 2 algebraically slice knots

Generalized Dedekind sums

On the Burau representation modulo a small prime

Free group automorphisms with many fixed points at infinity