Content deleted Content added
→Proof: Improved wording to make it more clear |
Geometry guy (talk | contribs) subcat |
||
Line 19:
A corollary of this theorem is the two-step subgroup test which states that a nonempty subset of a group is itself a group if the subset is [[Closure (mathematics)|closed]] under the operation as well as under the taking of inverses.
[[Category:
[[Category:Articles containing proofs]]
| |||