Sciweavers

AML
2004
78views more  AML 2004»
13 years 11 months ago
Matrix identities and the pigeonhole principle
We show that short bounded-depth Frege proofs of matrix identities, such as P Q = I QP = I (over the field of two elements), imply short bounded-depth Frege proofs of the pigeonho...
Michael Soltys, Alasdair Urquhart