同型性 - Wolfram MathWorldから

Isomorphism -- from Wolfram MathWorld Isomorphism Isomorphism is a very general concept that appears in several areas of mathematics. The word derives from the Greek iso , meaning "equal," and morphosis , meaning "to form" or "to shape." Formally, an isomorphism is bijective morphism . Informally, an isomorphism is a map that preserves sets and relations among elements. " is isomorphic to " is written . Unfortunately, this symbol is also used to denote geometric congruence . An isomorphism from a set of elements onto itself is called an automorphism . See also Automorphism , Ax-Kochen Isomorphism Theorem , Graph Isomorphism , Homeomorphism , Isomorphic Graphs , Isomorphic Groups , Morphism Explore this topic in the MathWorld classroom Explore with Wolfram|Alpha More things to try: graph isomorphism problem z-score graph isomorphism problem status Cite this as: Weisstein, Eric W. "Isomorphism." From MathWorld --A Wolfram Resource. https://mathworld.wolfram.com/Isomorphism.html Subject classifications Created, developed and nurtured by Eric Weisstein at Wolfram Research