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  The Weierstrass elliptic  function  and its inverse  can be represented through the more general hypergeometric Appell  function of two variables by the following formulas: The Weierstrass functions  ,  ,  ,  ,  ,  , and  can be represented through some related equivalent functions, for example, through Jacobi functions: where  is modular lambda function, or through theta functions: or through elliptic integrals and the inverse elliptic nome: The Weierstrass function  and its derivative  are interconnected with the inverse functions  and  by the following formulas: Each of the Weierstrass functions  ,  ,  ,  , and  can be expressed through the other Weierstrass functions using numerous formulas, for example: Note that the Weierstrass functions  ,  ,  ,  , and  form a chain with respect to differentiation: |