Bounds for the Entropy of Graded Algebras
Jan Snellman
Abstract
Newman, Schneider and Shalev defined the entropy of a graded associative algebra A as H(A) = n ∞ [n]an, where an is the vector space dimension of the n'th homogeneous component. When A is the homogeneous quotient of a finitely generated free associative algebra, they showed that H(A) a2. Using some results of Friedland on the maximal spectral radius of 0-1 matrices with a prescribed number of ones, we improve on this bound.
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