Combinatorial Methods in Topology and Algebraic Geometry

Abstract

Topology and Combinatorial Group Theory: Collapses of $K\times I$ and group presentations by M. Cohen, W. Metzler, and K. Sauermann On the Andrews-Curtis-Conjecture and related problems by W. Metzler Integral representations of $AutF^n$ and presentation classes of groups by M. Lustig and W. Metzler A note on commutators and squares in free products by R. Goldstein and E. C. Turner Rigidity of almost crystallographic groups by K. B. Lee and F. Raymond Finite graphs and free groups by J. R. Stallings A topological proof of a theorem of Brunner and Burns about M. Hall groups by C. Tretkoff and M. Tretkoff Knot Theory: The Murasugi sum is a natural geometric operation II by D. Gabai The Arf Invariant of classical knots by L. H. Kauffman The unknotting number of a classical knot by W. B. R. Lickorish A general position theorem for surfaces in Euclidean $4$-space by B. Trace 3-Manifolds: n the equivariant Dehn lemma by A. L. Edmonds Virtually Haken manifolds by J. Hempel Lectures on $3$-fold simple coverings and $3$-manifolds by J. M. Montesinos The Witt classes of Seifert manifolds by H. S. Oh Outermost forks and a theorem of Jaco by M. Scharlemann Surfaces in $3$-manifolds by J. R. Stallings Homotopy Theory and Infinite Dimensional Topology: Taming Hopf invariants by M. G. Barratt Artin's braid groups and classical homotopy theory by F. R. Cohen More compacta of infinite cohomological dimension by L. R. Rubin Endomorphisms in the homotopy category by A. Zabrodsky Four Manifolds and Algebraic Surfaces: On fake $S^3\sim \times S^1 No. S^2\times S^2$ by S. Akbulut Manifolds having non-ample Norman bundles in quadrices by N. Goldstein Lefschetz fibrations of Riemann surfaces and decompositions of complex elliptic surfaces by R. Mandelbaum Algebraic surfaces and the arithmetic of braids, II by B. Moishezon A note on moves and on irregular coverings of $S^4$ by J. Montesinos.