Yoneda product
http://dbpedia.org/resource/Yoneda_product
In algebra, the Yoneda product (named after Nobuo Yoneda) is the pairing between Ext groups of modules: induced by Specifically, for an element , thought of as an extension , and similarly , we form the Yoneda (cup) product . Note that the middle map factors through the given maps to . We extend this definition to include using the usual functoriality of the groups.
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Yoneda product
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1000385977
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In algebra, the Yoneda product (named after Nobuo Yoneda) is the pairing between Ext groups of modules: induced by Specifically, for an element , thought of as an extension , and similarly , we form the Yoneda (cup) product . Note that the middle map factors through the given maps to . We extend this definition to include using the usual functoriality of the groups.
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4175