When1: 1951
When2: 1966
Who: Abraham Robinson [Robinson, Abraham]
What: mathematician
Where: Germany/USA
works\ On the Metamathematics of Algebra [1951]; Non-Standard Analysis [1961 to 1966]
Detail: He lived 1918 to 1974 and developed the idea of infinitesimals as greater than zero but smaller than all positive numbers {nonstandard analysis, Robinson}. He described infinitesimal neighborhoods of points infinitely close to a point {compactness theorem, Robinson}.
Mathematical Sciences>Mathematics>History>Calculus
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Date Modified: 2022.0224