Abstract
In this paper we prove that the Hodge conjecture is true for any self-product of the jacobian variety $J(C_{p^\mu,q^\nu})$ of the curve $C_{p^\mu,q^\nu} : y^{q^\nu}=x^{p^\mu}-1$, where $p^\mu$ and $q^\nu$ are powers of distinct prime numbers $p$ and $q$. We also prove that the Hodge ring of $J(C_{p^\mu,q^\nu})$ is {\it not} generated by the divisor classes whenever $p^\mu q^\nu\neq 12$ and $(\mu,\nu)\neq(1,1)$.
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