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Theorem pwuninel 4486
Description: The power set of the union of a set does not belong to the set. This theorem provides a way of constructing a new set that doesn't belong to a given set.
Assertion
Ref Expression
pwuninel ¬ A A

Proof of Theorem pwuninel
StepHypRef Expression
1 sdomirr 4472 . . 3 ¬ A A
2 uniexb 2907 . . . 4 (A VA V)
3 ssdom2g 4409 . . . . . 6 (A V → (A AA A))
4 domsdomtr 4476 . . . . . . . 8 ((A A A A) → A A)
5 canth2g 4485 . . . . . . . 8 (A VA A)
64, 5sylan2 451 . . . . . . 7 ((A A A V) → A A)
76expcom 374 . . . . . 6 (A V → (A AA A))
83, 7syld 27 . . . . 5 (A V → (A AA A))
9 elssuni 2526 . . . . 5 (A AA A)
108, 9syl5 21 . . . 4 (A V → (A AA A))
112, 10sylbi 199 . . 3 (A V → (A AA A))
121, 11mtoi 107 . 2 (A V → ¬ A A)
13 elisset 1817 . . . 4 (A AA V)
14 pwexb 2908 . . . . 5 (A VA V)
152, 14bitr 173 . . . 4 (A VA V)
1613, 15sylibr 200 . . 3 (A AA V)
1716con3i 98 . 2 A V → ¬ A A)
1812, 17pm2.61i 126 1 ¬ A A
Colors of variables: wff set class
Syntax hints:  ¬ wn 2   → wi 3   wcel 958  Vcvv 1811   wss 2047  cpw 2401  cuni 2503   class class class wbr 2619   cdom 4365   csdm 4366
This theorem is referenced by:  pnfnre 5496  spwnex3 8655
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 962  ax-gen 963  ax-8 964  ax-9 965  ax-10 966  ax-11 967  ax-12 968  ax-13 969  ax-14 970  ax-17 971  ax-4 973  ax-5o 975  ax-6o 978  ax-9o 1123  ax-10o 1140  ax-16 1210  ax-11o 1218  ax-ext 1459  ax-rep 2693  ax-sep 2703  ax-pow 2742  ax-pr 2779  ax-un 2866
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3an 777  df-ex 981  df-sb 1172  df-eu 1382  df-mo 1383  df-clab 1464  df-cleq 1469  df-clel 1472  df-ne 1587  df-ral 1649  df-rex 1650  df-rab 1652  df-v 1812  df-dif 2049  df-un 2050  df-in 2051  df-ss 2053  df-nul 2281  df-pw 2402  df-sn 2412  df-pr 2413  df-op 2416  df-uni 2504  df-br 2620  df-opab 2667  df-id 2835  df-xp 3184  df-rel 3185  df-cnv 3186  df-co 3187  df-dm 3188  df-rn 3189  df-res 3190  df-ima 3191  df-fun 3192  df-fn 3193  df-f 3194  df-f1 3195  df-fo 3196  df-f1o 3197  df-fv 3198  df-er 4261  df-en 4368  df-dom 4369  df-sdom 4370
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