The definition: A spherical neighborhood of a point is itself open-a-Euclidean Space in one dimension is a finite interval-Euclidean in two dimensions is a circle and Euclidean in 3-Dimensions and spheres- The blog looks the sphere in Euclidean-Geometry, non-Euclidean geometry, like sphere in a sphere or hyperbole for example, using differential geometry, topology and algebraic topology
Saturday, December 30, 2023
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Thursday, October 26, 2023
Thursday, September 21, 2023
Sunday, August 27, 2023
Sunday, July 30, 2023
Saturday, June 17, 2023
Saturday, May 20, 2023
Sunday, April 16, 2023
Friday, March 24, 2023
Saturday, February 18, 2023
Sunday, January 29, 2023
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