Published online by Cambridge University Press: 20 February 2018
In this paper we prove a conjecture relating the Whittaker function of a certain generating function with the Whittaker function of the theta representation $\unicode[STIX]{x1D6E9}_{n}^{(n)}$ . This enables us to establish that a certain global integral is factorizable and hence deduce the meromorphic continuation of the standard partial
$L$ function
$L^{S}(s,\unicode[STIX]{x1D70B}^{(n)})$ . In fact we prove that this partial
$L$ function has at most a simple pole at
$s=1$ . Here,
$\unicode[STIX]{x1D70B}^{(n)}$ is a genuine irreducible cuspidal representation of the group
$\text{GL}_{r}^{(n)}(\mathbf{A})$ .