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Theorem inf3lem4 4588
Description: Lemma for our Axiom of Infinity => standard Axiom of Infinity. See inf3 4592 for detailed description.
Hypotheses
Ref Expression
inf3lem.1 |- G = {<.y, z>. | z = {w e. x | (w i^i x) (_ y}}
inf3lem.2 |- F = (rec(G, (/)) |` om)
inf3lem.3 |- A e. V
inf3lem.4 |- B e. V
Assertion
Ref Expression
inf3lem4 |- ((x =/= (/) /\ x (_ U.x) -> (A e. om -> (F` A) (. (F` suc A)))
Distinct variable group:   x,y,z,w

Proof of Theorem inf3lem4
StepHypRef Expression
1 inf3lem.1 . . . . 5 |- G = {<.y, z>. | z = {w e. x | (w i^i x) (_ y}}
2 inf3lem.2 . . . . 5 |- F = (rec(G, (/)) |` om)
3 inf3lem.3 . . . . 5 |- A e. V
4 inf3lem.4 . . . . 5 |- B e. V
51, 2, 3, 4inf3lem1 4585 . . . 4 |- (A e. om -> (F` A) (_ (F` suc A))
65a1i 8 . . 3 |- ((x =/= (/) /\ x (_ U.x) -> (A e. om -> (F` A) (_ (F` suc A)))
71, 2, 3, 4inf3lem3 4587 . . 3 |- ((x =/= (/) /\ x (_ U.x) -> (A e. om -> (F` A) =/= (F` suc A)))
86, 7jcad 598 . 2 |- ((x =/= (/) /\ x (_ U.x) -> (A e. om -> ((F` A) (_ (F` suc A) /\ (F` A) =/= (F` suc A))))
9 df-pss 2045 . 2 |- ((F` A) (. (F` suc A) <-> ((F` A) (_ (F` suc A) /\ (F` A) =/= (F` suc A)))
108, 9syl6ibr 213 1 |- ((x =/= (/) /\ x (_ U.x) -> (A e. om -> (F` A) (. (F` suc A)))
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 223   = wceq 953   e. wcel 955   =/= wne 1577  {crab 1640  Vcvv 1802   i^i cin 2036   (_ wss 2037   (. wpss 2038  (/)c0 2270  U.cuni 2493  {copab 2656  suc csuc 2940  omcom 3121   |` cres 3162  ` cfv 3172  reccrdg 3916
This theorem is referenced by:  inf3lem5 4589
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-reg 4565
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-rab 1644  df-v 1803  df-sbc 1932  df-dif 2039  df-un 2040  df-in 2041  df-ss 2043  df-pss 2045  df-nul 2271  df-if 2352  df-pw 2392  df-sn 2402  df-pr 2403  df-tp 2405  df-op 2406  df-uni 2494  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-lim 2943  df-suc 2944  df-om 3122  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-fv 3188  df-rdg 3917
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