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Theorem weth 4759
Description: Well-ordering theorem: any set A can be well-ordered. This is an equivalent of the Axiom of Choice. Theorem 6 of [Suppes] p. 242. First proved by Ernst Zermelo (the "Z" in ZFC) in 1904.
Hypothesis
Ref Expression
weth.1 |- A e. V
Assertion
Ref Expression
weth |- E.x x We A
Distinct variable group:   x,A

Proof of Theorem weth
StepHypRef Expression
1 weth.1 . . 3 |- A e. V
21numth 4756 . 2 |- E.y e. On E.f f:y-1-1-onto->A
3 f1ocnv 3686 . . . . . 6 |- (f:y-1-1-onto->A -> `'f:A-1-1-onto->y)
4 eqid 1468 . . . . . . . . 9 |- {<.z, w>. | (`'f` z)E(`'f` w)} = {<.z, w>. | (`'f` z)E(`'f` w)}
54f1owe 3890 . . . . . . . 8 |- (`'f:A-1-1-onto->y -> (E We y -> {<.z, w>. | (`'f` z)E(`'f` w)} We A))
6 weinxp 3223 . . . . . . . . 9 |- ({<.z, w>. | (`'f` z)E(`'f` w)} We A <-> ({<.z, w>. | (`'f` z)E(`'f` w)} i^i (A X. A)) We A)
71, 1xpex 3250 . . . . . . . . . . 11 |- (A X. A) e. V
87inex2 2707 . . . . . . . . . 10 |- ({<.z, w>. | (`'f` z)E(`'f` w)} i^i (A X. A)) e. V
9 weeq1 2927 . . . . . . . . . 10 |- (x = ({<.z, w>. | (`'f` z)E(`'f` w)} i^i (A X. A)) -> (x We A <-> ({<.z, w>. | (`'f` z)E(`'f` w)} i^i (A X. A)) We A))
108, 9cla4ev 1860 . . . . . . . . 9 |- (({<.z, w>. | (`'f` z)E(`'f` w)} i^i (A X. A)) We A -> E.x x We A)
116, 10sylbi 199 . . . . . . . 8 |- ({<.z, w>. | (`'f` z)E(`'f` w)} We A -> E.x x We A)
125, 11syl6 22 . . . . . . 7 |- (`'f:A-1-1-onto->y -> (E We y -> E.x x We A))
13 eloni 2948 . . . . . . . 8 |- (y e. On -> Ord y)
14 ordwe 2951 . . . . . . . 8 |- (Ord y -> E We y)
1513, 14syl 10 . . . . . . 7 |- (y e. On -> E We y)
1612, 15syl5 21 . . . . . 6 |- (`'f:A-1-1-onto->y -> (y e. On -> E.x x We A))
173, 16syl 10 . . . . 5 |- (f:y-1-1-onto->A -> (y e. On -> E.x x We A))
181719.23aiv 1290 . . . 4 |- (E.f f:y-1-1-onto->A -> (y e. On -> E.x x We A))
1918com12 11 . . 3 |- (y e. On -> (E.f f:y-1-1-onto->A -> E.x x We A))
2019r19.23aiv 1735 . 2 |- (E.y e. On E.f f:y-1-1-onto->A -> E.x x We A)
212, 20ax-mp 7 1 |- E.x x We A
Colors of variables: wff set class
Syntax hints:   -> wi 3   e. wcel 955  E.wex 977  E.wrex 1638  Vcvv 1802   i^i cin 2036   class class class wbr 2609  {copab 2656  Ecep 2819   We wwe 2906  Ord word 2937  Oncon0 2938   X. cxp 3158  `'ccnv 3159  -1-1-onto->wf1o 3171  ` cfv 3172
This theorem is referenced by:  zorn2lem7 4766  acdc3 7429  acdc2 7432  acdc5 7435  acdc 7437
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 959  ax-gen 960  ax-8 961  ax-9 962  ax-10 963  ax-11 964  ax-12 965  ax-13 966  ax-14 967  ax-17 968  ax-4 970  ax-5o 972  ax-6o 975  ax-9o 1119  ax-10o 1136  ax-16 1206  ax-11o 1213  ax-ext 1452  ax-rep 2683  ax-sep 2693  ax-nul 2700  ax-pow 2732  ax-pr 2769  ax-un 2857  ax-ac 4716
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3or 774  df-3an 775  df-ex 978  df-sb 1168  df-eu 1375  df-mo 1376  df-clab 1457  df-cleq 1462  df-clel 1465  df-ne 1579  df-ral 1641  df-rex 1642  df-reu 1643  df-rab 1644  df-v 1803  df-sbc 1932  df-dif 2039  df-un 2040  df-in 2041  df-ss 2043  df-nul 2271  df-pw 2392  df-sn 2402  df-pr 2403  df-tp 2405  df-op 2406  df-uni 2494  df-int 2524  df-iun 2558  df-br 2610  df-opab 2657  df-tr 2671  df-eprel 2821  df-id 2824  df-po 2831  df-so 2841  df-fr 2907  df-we 2924  df-ord 2941  df-on 2942  df-suc 2944  df-xp 3174  df-rel 3175  df-cnv 3176  df-co 3177  df-dm 3178  df-rn 3179  df-res 3180  df-ima 3181  df-fun 3182  df-fn 3183  df-f 3184  df-f1 3185  df-fo 3186  df-f1o 3187  df-fv 3188  df-iso 3189
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