Category:Open problems

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The main article for this category is Open problems.

Use subcategories where applicable, e.g. Category:Unsolved crimes, Category:Unexplained disappearances. For open disputes, try Category:Controversies or Category:Conflict.

Subcategories

This category has the following 16 subcategories, out of 16 total.

 

B

C

D

E

H

I

L

P

S

U

U cont.

W

Y