When1: 1854
Who: Karl Weierstrass [Weierstrass, Karl]
What: mathematician
Where: Germany
works\ On the Theory of Abelian Functions [1854]
Detail: He lived 1815 to 1897, used arithmetic concepts for mathematical analysis, and studied real number theory, analytic and elliptic functions, and uniform convergence. He invented Weierstrass-Bolzano theorem [1854]. To remove contradictions introduced by infinitesimals, he reformulated calculus using limits and exhaustion method. Elliptic complex functions are sums of convergent power functions. Irrational numbers are rational-number-series convergences.
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Date Modified: 2022.0224