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Theorem mapss 6681
Description: Subset inheritance for set exponentiation. Theorem 99 of [Suppes] p. 89. (Contributed by NM, 10-Dec-2003.) (Revised by Mario Carneiro, 26-Apr-2015.)
Assertion
Ref Expression
mapss  |-  ( ( B  e.  V  /\  A  C_  B )  -> 
( A  ^m  C
)  C_  ( B  ^m  C ) )

Proof of Theorem mapss
Dummy variable  f is distinct from all other variables.
StepHypRef Expression
1 elmapi 6660 . . . . . 6  |-  ( f  e.  ( A  ^m  C )  ->  f : C --> A )
21adantl 277 . . . . 5  |-  ( ( ( B  e.  V  /\  A  C_  B )  /\  f  e.  ( A  ^m  C ) )  ->  f : C
--> A )
3 simplr 528 . . . . 5  |-  ( ( ( B  e.  V  /\  A  C_  B )  /\  f  e.  ( A  ^m  C ) )  ->  A  C_  B
)
42, 3fssd 5370 . . . 4  |-  ( ( ( B  e.  V  /\  A  C_  B )  /\  f  e.  ( A  ^m  C ) )  ->  f : C
--> B )
5 simpll 527 . . . . 5  |-  ( ( ( B  e.  V  /\  A  C_  B )  /\  f  e.  ( A  ^m  C ) )  ->  B  e.  V )
6 elmapex 6659 . . . . . . 7  |-  ( f  e.  ( A  ^m  C )  ->  ( A  e.  _V  /\  C  e.  _V ) )
76simprd 114 . . . . . 6  |-  ( f  e.  ( A  ^m  C )  ->  C  e.  _V )
87adantl 277 . . . . 5  |-  ( ( ( B  e.  V  /\  A  C_  B )  /\  f  e.  ( A  ^m  C ) )  ->  C  e.  _V )
95, 8elmapd 6652 . . . 4  |-  ( ( ( B  e.  V  /\  A  C_  B )  /\  f  e.  ( A  ^m  C ) )  ->  ( f  e.  ( B  ^m  C
)  <->  f : C --> B ) )
104, 9mpbird 167 . . 3  |-  ( ( ( B  e.  V  /\  A  C_  B )  /\  f  e.  ( A  ^m  C ) )  ->  f  e.  ( B  ^m  C ) )
1110ex 115 . 2  |-  ( ( B  e.  V  /\  A  C_  B )  -> 
( f  e.  ( A  ^m  C )  ->  f  e.  ( B  ^m  C ) ) )
1211ssrdv 3159 1  |-  ( ( B  e.  V  /\  A  C_  B )  -> 
( A  ^m  C
)  C_  ( B  ^m  C ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    e. wcel 2146   _Vcvv 2735    C_ wss 3127   -->wf 5204  (class class class)co 5865    ^m cmap 6638
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 614  ax-in2 615  ax-io 709  ax-5 1445  ax-7 1446  ax-gen 1447  ax-ie1 1491  ax-ie2 1492  ax-8 1502  ax-10 1503  ax-11 1504  ax-i12 1505  ax-bndl 1507  ax-4 1508  ax-17 1524  ax-i9 1528  ax-ial 1532  ax-i5r 1533  ax-13 2148  ax-14 2149  ax-ext 2157  ax-sep 4116  ax-pow 4169  ax-pr 4203  ax-un 4427  ax-setind 4530
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1459  df-sb 1761  df-eu 2027  df-mo 2028  df-clab 2162  df-cleq 2168  df-clel 2171  df-nfc 2306  df-ne 2346  df-ral 2458  df-rex 2459  df-v 2737  df-sbc 2961  df-dif 3129  df-un 3131  df-in 3133  df-ss 3140  df-pw 3574  df-sn 3595  df-pr 3596  df-op 3598  df-uni 3806  df-br 3999  df-opab 4060  df-id 4287  df-xp 4626  df-rel 4627  df-cnv 4628  df-co 4629  df-dm 4630  df-rn 4631  df-iota 5170  df-fun 5210  df-fn 5211  df-f 5212  df-fv 5216  df-ov 5868  df-oprab 5869  df-mpo 5870  df-map 6640
This theorem is referenced by:  mapdom1g  6837  bj-charfunbi  14103
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