Talk:Factorization system
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Examples?
As far as I can tell, literally the only examples given here are the classes of injections and surjections in the category of sets. I think the page might be better with some more examples. vivacissamamente (talk) 01:34, 26 February 2014 (UTC)
Removed
In the section "Equivalent definition", I have removed the part
The condition (2) above can be shown to be equivalent to the condition
- (2') is exactly the class of isomorphisms of C.
because it is false : for example, in the category of sets, every function can be factorized into an injection followed by a surjection, through the coproduct , and a function which is both an injection and a surjection is an isomorphism, but it is not true that (Injections, Surjections) is a factorization system. It is a weak factorization system, whereas (Surjections, Injections) is a factorization system. breckes 2 October 2007
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