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Theorem rexxp 4480
 Description: Existential quantification restricted to a cross product is equivalent to a double restricted quantification. (Contributed by NM, 11-Nov-1995.) (Revised by Mario Carneiro, 14-Feb-2015.)
Hypothesis
Ref Expression
ralxp.1
Assertion
Ref Expression
rexxp
Distinct variable groups:   ,,,   ,,   ,,   ,   ,
Allowed substitution hints:   ()   (,)

Proof of Theorem rexxp
StepHypRef Expression
1 iunxpconst 4400 . . 3
21rexeqi 2510 . 2
3 ralxp.1 . . 3
43rexiunxp 4478 . 2
52, 4bitr3i 175 1
 Colors of variables: wff set class Syntax hints:   wi 4   wb 98   wceq 1243  wrex 2307  csn 3375  cop 3378  ciun 3657   cxp 4343 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-14 1405  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-sep 3875  ax-pow 3927  ax-pr 3944 This theorem depends on definitions:  df-bi 110  df-3an 887  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-ral 2311  df-rex 2312  df-v 2559  df-sbc 2765  df-csb 2853  df-un 2922  df-in 2924  df-ss 2931  df-pw 3361  df-sn 3381  df-pr 3382  df-op 3384  df-iun 3659  df-opab 3819  df-xp 4351  df-rel 4352 This theorem is referenced by:  rexxpf  4483  fnrnov  5646  foov  5647  ovelimab  5651  cnref1o  8582
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