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References to '$\mathcal{U}$-small'
1. 2-category by bci1
2. alternative definition of category by rspuzio
3. Brandt groupoid by CWoo
4. category by mathcam
5. category of $(M,R)$--systems by bci1
6. category of small categories by CWoo
7. cohomology of small categories by whm22
8. compositions of natural transformations by CWoo
9. connected category by CWoo
10. examples of algebraic systems by CWoo
11. examples of functor categories by bci1
12. examples of initial objects and terminal objects and zero objects by AxelBoldt
13. examples of pullbacks by CWoo
14. functor category by bci1
15. functor category by CWoo
16. Grothendieck category by bci1
17. groupoid (category theoretic) by CWoo
18. groupoid and group representations related to quantum symmetries by bci1
19. index of category theory by rspuzio
20. internal category by CWoo
21. limit of a functor by CWoo
22. locally compact groupoids by bci1
23. mathematical programs in quantum gravity by bci1
24. nerve by mhale
25. partial algebraic system by CWoo
26. pre-order by yark
27. quantum operator algebras in quantum field theories by bci1
28. Robert Rosen by bci1
29. sheaf by archibal
30. simplicial category by mhale
31. site by mathcam
32. skeleton by CWoo
33. subobject by CWoo
34. supercategory by bci1