Augustin-Louis Cauchy
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Baron Augustin-Louis Cauchy was a French mathematician, engineer, and physicist. He was one of the first to rigorously state and prove the key theorems of calculus, pioneered the field of complex anal
Portrait of Cauchy around 1840
Cauchy in later life
The title page of a textbook by Cauchy.
Leçons sur le calcul différentiel, 1829
Niels Henrik Abel
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Niels Henrik Abel was a Norwegian mathematician who made pioneering contributions in a variety of fields. His most famous single result is the first complete proof demonstrating the impossibility of s
Augustin-Louis Cauchy
…spite of these, Cauchy's own research papers often used intuitive, not rigorous, methods; thus one of his theorems was exposed to a "counter-example" by Abel, later fixed by the introduction of the notion of uniform continuity. In a paper published in 1855, two years before Cauchy's death, he discussed some…
Niels Henrik Abel
Postcard of Gjerstad church and rectory in 1890–95. The main building of the rectory was the same as when Abel lived here.
From the notebook of Niels Henrik Abel
Christine Kemp