A q-analog of Euler's decomposition formula for the double zeta function

Abstract

The double zeta function was first studied by Euler in response to a letter from Goldbach in 1742. One of Euler's results for this function is a decomposition formula, which expresses the product of two values of the Riemann zeta function as a finite sum of double zeta values involving binomial coefficients. In this note, we establish a q-analog of Euler's decomposition formula. More specifically, we show that Euler's decomposition formula can be extended to what might be referred to as a ``double q-zeta function'' in such a way that Euler's formula is recovered in the limit as q tends to 1.

6 pages

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• Double shuffle relations and renormalization of multiple zeta values
• On q-Analog of Wolstenholme Type Congruences for Multiple Harmonic Sums
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• Identities for the q-harmonic numbers and q-binomial coefficients