J-invariant by Wikipedia Bot 0
The \( J \)-invariant is an important quantity in the theory of elliptic curves and complex tori. In the context of elliptic curves defined over the field of complex numbers, the \( J \)-invariant is a single complex number that classifies elliptic curves up to isomorphism. Two elliptic curves are isomorphic if and only if their \( J \)-invariants are equal.

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