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单词 FreeProductWithAmalgamatedSubgroup
释义

free product with amalgamated subgroup


Definition 1.

Let Gk, k=0,1,2 be groups and ik:G0Gi, k=1,2 be monomorphismsMathworldPlanetmathPlanetmathPlanetmathPlanetmathPlanetmathPlanetmathPlanetmath.The free productMathworldPlanetmath of G1 and G2 with amalgamated subgroupMathworldPlanetmathPlanetmath G0,is defined to be a group G that has the followingtwo properties

  1. 1.

    there are homomorphismsMathworldPlanetmathPlanetmathPlanetmathPlanetmath jk:GkG, k=1,2 that make the followingdiagram commute

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