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Theorem f11 3655
Description: Alternate definition of a one-to-one function.
Assertion
Ref Expression
f11 |- (F:A-1-1->B <-> (F:A-->B /\ A.yE*x xFy))
Distinct variable group:   x,y,F

Proof of Theorem f11
StepHypRef Expression
1 df-f1 3190 . 2 |- (F:A-1-1->B <-> (F:A-->B /\ Fun `'F))
2 dffunmo 3523 . . . . 5 |- (Fun `'F <-> (Rel `'F /\ A.yE*x y`'Fx))
3 relcnv 3427 . . . . 5 |- Rel `'F
42, 3mpbiran 727 . . . 4 |- (Fun `'F <-> A.yE*x y`'Fx)
5 visset 1809 . . . . . . 7 |- y e. V
6 visset 1809 . . . . . . 7 |- x e. V
75, 6brcnv 3294 . . . . . 6 |- (y`'Fx <-> xFy)
87mobii 1403 . . . . 5 |- (E*x y`'Fx <-> E*x xFy)
98albii 997 . . . 4 |- (A.yE*x y`'Fx <-> A.yE*x xFy)
104, 9bitr 173 . . 3 |- (Fun `'F <-> A.yE*x xFy)
1110anbi2i 480 . 2 |- ((F:A-->B /\ Fun `'F) <-> (F:A-->B /\ A.yE*x xFy))
121, 11bitr 173 1 |- (F:A-1-1->B <-> (F:A-->B /\ A.yE*x xFy))
Colors of variables: wff set class
Syntax hints:   <-> wb 146   /\ wa 223  A.wal 952  E*wmo 1379   class class class wbr 2614  `'ccnv 3164  Rel wrel 3170  Fun wfun 3171  -->wf 3173  -1-1->wf1 3174
This theorem is referenced by:  f1fv 3865
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 960  ax-gen 961  ax-8 962  ax-10 964  ax-11 965  ax-12 966  ax-13 967  ax-14 968  ax-17 969  ax-4 971  ax-5o 973  ax-6o 976  ax-9o 1121  ax-10o 1138  ax-16 1208  ax-11o 1216  ax-ext 1457  ax-sep 2698  ax-pow 2737  ax-pr 2774
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 979  df-sb 1170  df-eu 1380  df-mo 1381  df-clab 1462  df-cleq 1467  df-clel 1470  df-ne 1584  df-v 1808  df-dif 2045  df-un 2046  df-in 2047  df-ss 2049  df-nul 2277  df-pw 2398  df-sn 2408  df-pr 2409  df-op 2412  df-br 2615  df-opab 2662  df-id 2830  df-xp 3179  df-rel 3180  df-cnv 3181  df-co 3182  df-fun 3187  df-f1 3190
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