Abstract
The level N and squarefree character q of a positive definite ternary quadratic form are defined so that its associated modular form has level N and character χ q {\chi _q} . We define à collection of correspondences between classes of quadratic forms having the same level and different discriminants. This makes practical a method for finding representatives of all classes of ternary forms having a given level. We also give a formula for the number of genera of ternary forms with a given level and character.
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