49 citations · 50 across the 7 of their papers we have counts for
7 papers
New results on binary linear codes
David B. Jaffe
This research announcement describes in very rough terms methods and a computer language under development, which can be used to prove the nonexistence of binary linear codes. Over…
A sextic surface cannot have 66 nodes
David B. Jaffe, Daniel Ruberman
Let S be a surface in complex projective 3-space, having only nodes as singularities. Suppose that S has degree 6. We show that the maximum number of nodes which S can have is 65.…
On sextic surfaces having only nodes (preliminary report)
David B. Jaffe
Let S be a surface in CP^3, having only nodes as singularities. Let pi: S~ --> S be a minimal resolution of singularities. A set N of nodes on S is EVEN if there exists a divisor Q…
On the Picard group: torsion and the kernel
Robert Guralnick, David Jaffe, Wayne Raskind +1
For a homomorphism f: A --> B of commutative rings, let D(A,B) denote Ker[Pic(A) --> Pic(B)]. Let k be a field and assume that A is a f.g. k-algebra. We prove a number of finitenes…
Functorial structure of units in a tensor product
David B. Jaffe
We study the units in a tensor product of rings. For example, let k be an algebraically closed field. Let A and B be reduced rings containing k, having connected spectra. Let u \in…
Coherent functors, with application to torsion in the Picard group
David B. Jaffe
Let A be a commutative noetherian ring. Call a functor <<commutative A-algebras>> --> <<sets>> coherent if it can be built up (via iterated finite limits) from functors of the form…