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Quotients for sets - #10
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- Generalize some definitions on (p)funcs to relations - Define reflexivity, symmetry, transitivity and equivalence for set-relations
- definition of the set of rational numbers as a set-quotient
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A set-theoretic definition of quotients. The definition is used to define the set of rationals as a quotient from integers.
In this process some definitions on (p)funcs were generalized to relations, and thus some defs/theorems were renamed accordingly.