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Published online by Cambridge University Press: 20 November 2018
Given a smooth projective curve   $C$  of positive genus
 $C$  of positive genus   $g$ , Torelli's theorem asserts that the pair
 $g$ , Torelli's theorem asserts that the pair   $\left( J\left( C \right),\,{{W}^{g-1}} \right)$  determines
 $\left( J\left( C \right),\,{{W}^{g-1}} \right)$  determines   $C$ . We show that the theorem is true with
 $C$ . We show that the theorem is true with   ${{W}^{g-1}}$  replaced by
 ${{W}^{g-1}}$  replaced by   ${{W}^{d}}$  for each
 ${{W}^{d}}$  for each   $d$  in the range
 $d$  in the range   $1\,\le \,d\,\le \,g\,-\,1$ .
 $1\,\le \,d\,\le \,g\,-\,1$ .