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References to 'subobject'
1. $C_3$-category by bci1
2. $C_3$-category generators corollary by bci1
3. $C_3$-category theorem by bci1
4. enough projectives by CWoo
5. equalizer by CWoo
6. exact sequence theorem in $C_3$--category by bci1
7. example of Klein 4-ring by Algeboy
8. Frattini subset by Algeboy
9. Grothendieck category by bci1
10. hereditary category by bci1
11. image of a morphism by CWoo
12. index of category theory by rspuzio
13. inverse image of a morphism by CWoo
14. normal category by CWoo
15. partial ordering on subobjects of an object by CWoo
16. presentations of algebraic objects by CWoo
17. quantum electrodynamics by bci1
18. quantum topos by bci1
19. quotient category, additive by bci1
20. relation on objects by CWoo
21. subobject classifier by CWoo
22. topos by CWoo
23. well-pointed topos by mps
24. wellpowered category by kompik