We prove that there are no n-agonal musquashes for n even with n = 6. This resolves a problem raised in Woodall's 1971 paper `Thrackles and Deadlock'. c 1999 Elsevier Sc...
We construct a large number of record-breaking binary, ternary and quaternary codes. Our methods involve the study of BCH-codes over larger fields, concatenation, construction X a...