In Chapter 2 we gave the simple transformation law of the Klein forms. It is quite easy from this to deduce when a power product of Klein forms is modular of a given level. We also want to determine when power products of other functions are modular of level N, for instance forms which are differences of Weierstrass ℘-functions.
KeywordsPower Product Primitive Element Quadratic Relation Addition Formula Weierstrass Form
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