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math.AG2005
Principal polarizations on products of elliptic curves
Herbert Lange
An abelian variety admits only a finite number of isomorphism classes of principal polarizations. The paper gives an interpretation of this number in terms of class numbers of defi…
math.AG2005
Polarizations of Prym Varieties of pairs of coverings
H. Lange, S. Recillas
To any pair of coverings $f_i: X \ra X_i, i = 1,2$ of smooth projective curves one can associate an abelian subvariety of the Jacobian , the Prym variety of the p…