PlanetPhysics/Borel Morphism

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Let Failed to parse (unknown function "\grp"): {\displaystyle \grp_B} and Failed to parse (unknown function "\grp"): {\displaystyle \grp_B} * be two groupoids whose object spaces are Borel. An \htmladdnormallink{algebraic {http://planetphysics.us/encyclopedia/CoIntersections.html} morphism} from Failed to parse (unknown function "\grp"): {\displaystyle \grp_B} to Failed to parse (unknown function "\grp"): {\displaystyle \grp_B} * is defined as a left action of Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "http://localhost:6011/en.wikiversity.org/v1/":): {\displaystyle \grp_B} on Failed to parse (unknown function "\grp"): {\displaystyle \grp_B} * which commutes with the multiplication on Failed to parse (unknown function "\grp"): {\displaystyle \grp_B} . Such an algebraic morphism between Borel groupoids is said to be a Borel morphism if the action of Failed to parse (unknown function "\grp"): {\displaystyle \grp_B} on Failed to parse (unknown function "\grp"): {\displaystyle \grp_B} * is Borel (viz. ref. [1])

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[1]

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  1. 1.0 1.1 M.R. Buneci. 2006., Groupoid C*-Algebras., Surveys in Mathematics and its Applications , Volume 1: 71--98.