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Enriched categories, topoi, abelian categories, monoidal categories, homological algebra.
0
votes
Graphs with dangling edges
There exist partial algebras ( having nontotal basic operations ), multi-typed structures,
hypergraphs, and various flavors of categories, so why not partial multigraphs?
Unfortunately, your descri …
4
votes
Shape of axioms in algebraic structures
x = "preservation".
Usually one is motivated to study a structure because it
serves as a model for something of interest. Likewise a
certain statement or class of statements may have nice
consequenc …