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Theorem fovrnd 5986
Description: An operation's value belongs to its codomain. (Contributed by Mario Carneiro, 29-Dec-2016.)
Hypotheses
Ref Expression
fovrnd.1  |-  ( ph  ->  F : ( R  X.  S ) --> C )
fovrnd.2  |-  ( ph  ->  A  e.  R )
fovrnd.3  |-  ( ph  ->  B  e.  S )
Assertion
Ref Expression
fovrnd  |-  ( ph  ->  ( A F B )  e.  C )

Proof of Theorem fovrnd
StepHypRef Expression
1 fovrnd.1 . 2  |-  ( ph  ->  F : ( R  X.  S ) --> C )
2 fovrnd.2 . 2  |-  ( ph  ->  A  e.  R )
3 fovrnd.3 . 2  |-  ( ph  ->  B  e.  S )
4 fovrn 5984 . 2  |-  ( ( F : ( R  X.  S ) --> C  /\  A  e.  R  /\  B  e.  S
)  ->  ( A F B )  e.  C
)
51, 2, 3, 4syl3anc 1228 1  |-  ( ph  ->  ( A F B )  e.  C )
Colors of variables: wff set class
Syntax hints:    -> wi 4    e. wcel 2136    X. cxp 4602   -->wf 5184  (class class class)co 5842
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-sbc 2952  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-br 3983  df-opab 4044  df-id 4271  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-iota 5153  df-fun 5190  df-fn 5191  df-f 5192  df-fv 5196  df-ov 5845
This theorem is referenced by:  eroveu  6592  isxmet2d  12988  ismet2  12994  comet  13139  bdmetval  13140  txmetcnp  13158  limccnp2lem  13285  limccnp2cntop  13286
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