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- Compaq ES 1869 Audio Feature Board - Model X071 - ESS Technology ES1869F-0312.jpg|The ES18 [[Category:Computer-related introductions in 1984]] ...21 KB (3,199 words) - 06:21, 30 December 2024
- [[File:Elie-Cartan-1904.png|thumb|right|130px|[[Élie Cartan]] (1869–1951)]] ...nian space was introduced. Christoffel introduced his eponymous symbols in 1869. Tensor calculus was developed by [[Ricci]], who published a systematic tre ...69 KB (10,718 words) - 21:39, 16 February 2025