Re: multiplicative group question

From: David Wagner (daw_at_taverner.cs.berkeley.edu)
Date: 07/03/05 

Date: Sun, 3 Jul 2005 21:09:06 +0000 (UTC)

Kristian Gjøsteen wrote:
>Isn't the following a trivial example? Hom(Z_n*,Z_n*) is a ring, [..]

How do you represent elements of Hom(Z_n*,Z_n*) efficiently?
I don't see any way other than simply listing the truth table
of the mapping -- which is not a polynomial-size representation.

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