Revision history of "Notes:Hereditary sigma-ring/Proof of facts"

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  • (cur | prev) 02:23, 8 April 2016‎ Alec (Talk | contribs)‎ m . . (3,644 bytes) (+1,252)‎
  • (cur | prev) 01:13, 8 April 2016‎ Alec (Talk | contribs)‎ . . (2,392 bytes) (+2,392)‎ . . (Created page with "# An hereditary system is a sigma-ring {{M|\iff}} it is closed under countable unions. ## Hereditary system is a sigma-ring {{M|\implies}} closed under countable unions ##* It...")
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