HomeHome Metamath Proof Explorer < Previous   Next >
Related theorems
Unicode version

Theorem uniimadomf 4821
Description: An upper bound for the cardinality of the union of an image. Theorem 10.48 of [TakeutiZaring] p. 99. This version of uniimadom 4820 uses a bound-variable hypothesis in place of a distinct variable condition.
Hypotheses
Ref Expression
uniimadomf.1 |- (y e. F -> A.x y e. F)
uniimadomf.2 |- A e. V
uniimadomf.3 |- B e. V
Assertion
Ref Expression
uniimadomf |- ((Fun F /\ A.x e. A (F` x) ~<_ B) -> U.(F"A) ~<_ (A X. B))
Distinct variable groups:   x,A   x,y,B   y,F

Proof of Theorem uniimadomf
StepHypRef Expression
1 uniimadomf.2 . . 3 |- A e. V
2 uniimadomf.3 . . 3 |- B e. V
31, 2uniimadom 4820 . 2 |- ((Fun F /\ A.z e. A (F` z) ~<_ B) -> U.(F"A) ~<_ (A X. B))
4 ax-17 973 . . 3 |- ((F` x) ~<_ B -> A.z(F` x) ~<_ B)
5 uniimadomf.1 . . . . 5 |- (y e. F -> A.x y e. F)
6 ax-17 973 . . . . 5 |- (y e. z -> A.x y e. z)
75, 6hbfv 3735 . . . 4 |- (y e. (F` z) -> A.x y e. (F` z))
8 ax-17 973 . . . 4 |- (y e. ~<_ -> A.x y e. ~<_ )
9 ax-17 973 . . . 4 |- (y e. B -> A.x y e. B)
107, 8, 9hbbr 2663 . . 3 |- ((F` z) ~<_ B -> A.x(F` z) ~<_ B)
11 fveq2 3730 . . . 4 |- (x = z -> (F` x) = (F` z))
1211breq1d 2634 . . 3 |- (x = z -> ((F` x) ~<_ B <-> (F` z) ~<_ B))
134, 10, 12cbvral 1801 . 2 |- (A.x e. A (F` x) ~<_ B <-> A.z e. A (F` z) ~<_ B)
143, 13sylan2b 454 1 |- ((Fun F /\ A.x e. A (F` x) ~<_ B) -> U.(F"A) ~<_ (A X. B))
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 223  A.wal 956   = wceq 958   e. wcel 960  A.wral 1648  Vcvv 1814  U.cuni 2507   class class class wbr 2624   X. cxp 3174  "cima 3179  Fun wfun 3182  ` cfv 3188   ~<_ cdom 4371
This theorem is referenced by:  iundom 4822
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 964  ax-gen 965  ax-8 966  ax-9 967  ax-10 968  ax-11 969  ax-12 970  ax-13 971  ax-14 972  ax-17 973  ax-4 975  ax-5o 977  ax-6o 980  ax-9o 1125  ax-10o 1142  ax-16 1212  ax-11o 1220  ax-ext 1462  ax-rep 2698  ax-sep 2708  ax-nul 2715  ax-pow 2748  ax-pr 2785  ax-un 2872  ax-reg 4602  ax-inf2 4634  ax-ac 4754
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3or 778  df-3an 779  df-ex 983  df-sb 1174  df-eu 1384  df-mo 1385  df-clab 1467  df-cleq 1472  df-clel 1475  df-ne 1590  df-ral 1652  df-rex 1653  df-reu 1654  df-rab 1655  df-v 1815  df-sbc 1945  df-dif 2052  df-un 2053  df-in 2054  df-ss 2056  df-nul 2284  df-if 2366  df-pw 2406  df-sn 2416  df-pr 2417  df-tp 2419  df-op 2420  df-uni 2508  df-int 2538  df-iun 2572  df-iin 2573  df-br 2625  df-opab 2672  df-tr 2686  df-eprel 2838  df-id 2841  df-po 2846  df-so 2856  df-fr 2923  df-we 2940  df-ord 2957  df-on 2958  df-lim 2959  df-suc 2960  df-om 3138  df-xp 3190  df-rel 3191  df-cnv 3192  df-co 3193  df-dm 3194  df-rn 3195  df-res 3196  df-ima 3197  df-fun 3198  df-fn 3199  df-f 3200  df-f1 3201  df-fo 3202  df-f1o 3203  df-fv 3204  df-rdg 3938  df-en 4374  df-dom 4375  df-r1 4653  df-rank 4654
Copyright terms: Public domain