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, 2017
Tuesday, October 3, 2017
Monday, September 25, 2017
Monday, August 21, 2017
Invariant
Invariant is a property, held by a class of mathematical objects, which remains unchanged when transformation.
Transformation: is a function who maps to itself, in Euclidean geometry, move every point in the same direction or a constant vector for every point as shifting the origin of the coordinate system. The syetem can be rotate (sniping)
Transformation: is a function who maps to itself, in Euclidean geometry, move every point in the same direction or a constant vector for every point as shifting the origin of the coordinate system. The syetem can be rotate (sniping)
Tuesday, July 25, 2017
Topology
- A definition for General Topology is Geometry of Sets, and the 1 to 1 and onto. A detail properties must be continuous (one to one correspondence), Compact, connected (onto)
- Algebraic Topology considers homology (one to one correspondence) a manifold is not a Circle. Homotopy record their properties can be consider onto.
- Differential Topology considers the Geometry of the Manifolds
- Geometric Topology considers manifolds and maps (one to one correspondence) between them, particularly embeddings of one manifold into another.
Saturday, June 3, 2017
Monday, May 15, 2017
Saturday, March 4, 2017
Monday, January 16, 2017
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