Welcome to the Sherwiki mini wiki at Scratchpad!
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[[Category:Sherwiki]] on the page before you save it to make it part of the Sherwiki wiki (preload can be enabled to automate this task, by clicking this link and saving that page. Afterwards, you may need to purge this page, if you still see this message).
Some Set Inclusions
Limits of Sequences in
A sequence of real numbers, , converges to if and only if for all there exists some such that whenever .
A group, , is abelian if and only if for all , .