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bmbumpus.com | ||
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www.jeremykun.com
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| | | | | Last time we worked through some basic examples of universal properties, specifically singling out quotients, products, and coproducts. There are many many more universal properties that we will mention as we encounter them, but there is one crucial topic in category theory that we have only hinted at: functoriality. As we've repeatedly stressed, the meat of category theory is in the morphisms. One natural question one might ask is, what notion of morphism is there between categories themselves? | |
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ncatlab.org
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bartoszmilewski.com
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| | | | | Previously: Sheaves and Topology. In our quest to rewrite topology using the language of category theory we introduced the category of open sets with set inclusions as morphisms. But when we needed to describe open covers, we sort of cheated: we chose to talk about set unions. Granted, set unions can be defined as coproducts... | |
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statsandr.com
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| | | Learn how to do a two-way ANOVA in R. You will also learn its aim, hypotheses, assumptions, and how to interpret the results of the two-way ANOVA | ||
