User contributions for 81.147.119.151
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4 January 2014
- 01:3701:37, 4 January 2014 diff hist +5,106 N Class (set theory) No edit summary
1 January 2014
- 01:5701:57, 1 January 2014 diff hist +18,395 N Axiom of regularity →No infinite descending sequence of sets exists