Ideas of Karl Weierstrass, by Theme

[German, 1815 - 1897, A school teacher.]

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6. Mathematics / A. Nature of Mathematics / 4. The Infinite / l. Infinitesimals
Weierstrass eliminated talk of infinitesimals
6. Mathematics / A. Nature of Mathematics / 4. The Infinite / m. Limits
Weierstrass made limits central, but the existence of limits still needed to be proved