Theorem mapss 6838

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.

Step	Hyp	Ref	Expression
1		elmapi 6817	. . . . . 6 |- ( f e. ( A ^m C ) -> f : C --> A )
2	1	adantl 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 )
4	2, 3	fssd 5486	. . . 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 6816	. . . . . . 7 |- ( f e. ( A ^m C ) -> ( A e. _V /\ C e. _V ) )
7	6	simprd 114	. . . . . 6 |- ( f e. ( A ^m C ) -> C e. _V )
8	7	adantl 277	. . . . 5 |- ( ( ( B e. V /\ A C_ B ) /\ f e. ( A ^m C ) ) -> C e. _V )
9	5, 8	elmapd 6809	. . . 4 |- ( ( ( B e. V /\ A C_ B ) /\ f e. ( A ^m C ) ) -> ( f e. ( B ^m C ) <-> f : C --> B ) )
10	4, 9	mpbird 167	. . 3 |- ( ( ( B e. V /\ A C_ B ) /\ f e. ( A ^m C ) ) -> f e. ( B ^m C ) )
11	10	ex 115	. 2 |- ( ( B e. V /\ A C_ B ) -> ( f e. ( A ^m C ) -> f e. ( B ^m C ) ) )
12	11	ssrdv 3230	1 |- ( ( B e. V /\ A C_ B ) -> ( A ^m C ) C_ ( B ^m C ) )

Syntax hints:   -> wi 4   /\ wa 104   e. wcel 2200   _Vcvv 2799   C_ wss 3197   -->wf 5314  (class class class)co 6001   ^m cmap 6795

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-fv 5326  df-ov 6004  df-oprab 6005  df-mpo 6006  df-map 6797

This theorem is referenced by:  mapdom1g  7008  plyss  15412  bj-charfunbi  16174