# Is there a product expansion of $\zeta(z)$ valid for iff $\operatorname{Re}(z)\geq1/2$?

Let $\zeta(z)$ be the Riemann zeta function.

Is there a product expansion of $\zeta(z)$ valid for iff $\operatorname{Re}(z)\geq1/2$?

A general way to do such things might be the (unelegant) method of multiplication by a product expansion of $\operatorname{id}(z)$ valid for iff $\operatorname{Re}(z)\geq1/2$.

How to find such an expression?

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@Matt : Thanks for the edit. –  mick Oct 8 '12 at 12:47
Maybe you find this helpful... –  draks ... Oct 8 '12 at 12:48