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References to 'epi'
1. balanced category by CWoo
2. duality principle by mathcam
3. enough projectives by CWoo
4. epimorphic extension by jocaps
5. epimorphic hull by jocaps
6. equalizer by CWoo
7. examples of epis by CWoo
8. finite projective plane by Mathprof
9. incidence structure by CWoo
10. index of category theory by rspuzio
11. kernel of a morphism by CWoo
12. monic by rspuzio
13. regular monomorphism by CWoo
14. strong monomorphism by CWoo
15. subobject by CWoo
16. supplemental axioms for an Abelian category by archibal
17. types of homomorphisms by rspuzio