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Theorem f11 3664
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 3195 . 2 |- (F:A-1-1->B <-> (F:A-->B /\ Fun `'F))
2 dffunmo 3531 . . . . 5 |- (Fun `'F <-> (Rel `'F /\ A.yE*x y`'Fx))
3 relcnv 3435 . . . . 5 |- Rel `'F
42, 3mpbiran 728 . . . 4 |- (Fun `'F <-> A.yE*x y`'Fx)
5 visset 1813 . . . . . . 7 |- y e. V
6 visset 1813 . . . . . . 7 |- x e. V
75, 6brcnv 3299 . . . . . 6 |- (y`'Fx <-> xFy)
87mobii 1405 . . . . 5 |- (E*x y`'Fx <-> E*x xFy)
98albii 999 . . . 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 954  E*wmo 1381   class class class wbr 2619  `'ccnv 3169  Rel wrel 3175  Fun wfun 3176  -->wf 3178  -1-1->wf1 3179
This theorem is referenced by:  f1fv 3874
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-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-sep 2703  ax-pow 2742  ax-pr 2779
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  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-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-br 2620  df-opab 2667  df-id 2835  df-xp 3184  df-rel 3185  df-cnv 3186  df-co 3187  df-fun 3192  df-f1 3195
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