2000 character limit reached
On extremal self-dual codes of length 120 (1302.0033v1)
Published 31 Jan 2013 in cs.IT and math.IT
Abstract: We prove that the only primes which may divide the order of the automorphism group of a putative binary self-dual doubly-even [120, 60, 24] code are 2, 3, 5, 7, 19, 23 and 29. Furthermore we prove that automorphisms of prime order $p \geq 5$ have a unique cycle structure.