Dedekind was a German mathematician who worked in the area od abstract algebra and algebraic number theory. He developed a major redefintion of irrational numbers through his Dedekind cut where an irrational number is a boundary that separates two collections of rational numbers where every member of one set is strictly larger than the members of the other set.
Stamp | Description |
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German Demoncratic Republic, 25pf, 1981 Scott: 2181 A658 |