Specific Categories
- Category of sets –
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- Concrete category –
- Category of vector spaces –
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- Category of graded vector spaces –
- Category of chain complexes –
- Category of finite dimensional Hilbert spaces –
- Category of sets and relations –
- Category of topological spaces –
- Category of metric spaces –
- Category of preordered sets –
- Category of groups –
- Category of abelian groups –
- Category of rings –
- Category of magmas –
- Category of medial magmas –
Read more about this topic: Outline Of Category Theory
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“I was asking for something specific and perfect for my city,
Whereupon lo! upsprang the aboriginal name.
Now I see what there is in a name, a word, liquid, sane, unruly,
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I see that the word of my city is that word from of old,
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“Of course I’m a black writer.... I’m not just a black writer, but categories like black writer, woman writer and Latin American writer aren’t marginal anymore. We have to acknowledge that the thing we call “literature” is more pluralistic now, just as society ought to be. The melting pot never worked. We ought to be able to accept on equal terms everybody from the Hassidim to Walter Lippmann, from the Rastafarians to Ralph Bunche.”
—Toni Morrison (b. 1931)