# An inverse mellin transform

Is it possible to compute the inverse transform of

$$\frac{1}{a^{-s}\cos( \frac{\pi s}{2})\Gamma (s)}$$

or similarly is it possible to compute the Inverse Mellin transform ??

$$\frac{ \zeta (1-s)}{\zeta (s)}$$

$$\frac{ \zeta (s)}{\zeta (1-s)}$$

the Mellin inverse is given by

$$\frac{1}{2\pi i}\int_{c-i\infty}^{c+i\infty}dsF(s)x^{-s}$$

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For the Mellin transformed function, you have to provide the strip on which it is defined; the reverse transform depends on this strip ($c$ has to within the strip). –  Fabian Dec 16 '12 at 17:36
in this case , can we find a function so $$\frac{\zeta (1-s)}{\zeta (s)}= \int_{0}^{\infty}dt f(t)t^{s-1}$$ –  Jose Garcia Dec 16 '12 at 21:46
again, for which values of $\text{Re} s$ this relation should hold? –  Fabian Dec 16 '12 at 22:14