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Hace 22 horas · Beginning with Carl Friedrich Gauss's 1832 proof that prime numbers such as five can be factored in Gaussian integers, Évariste Galois's introduction of permutation groups in 1832 (although, because of his death, his papers were published only in 1846, by Liouville), William Rowan Hamilton's discovery of quaternions in 1843, and Arthur Cayley's more modern definition of groups in 1854 ...
- German
- Paul Gordan
Hace 22 horas · The timeline of historic inventions is a chronological list of particularly important or significant technological inventions and their inventors, where known. [a] History of technology By technological eras Premodern Prehistoric Stone Age (lithic) Neolithic Revolution Copper Age Bronze Age Iron Age Ancient Modern Proto-industrialization First Industrial Revolution Standardization Second ...
Hace 22 horas · 1912 - Heinrich Baumhauer discovered and described polytypism in crystals of carborundum, or silicon carbide. [50] 1913 - Lawrence Bragg published the first observation of x-ray diffraction by crystals. [51] 1913 - Georges Friedel stated Friedel's law, a property of Fourier transforms of real functions.
