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Theorem fovrn 5995
Description: An operation's value belongs to its codomain. (Contributed by NM, 27-Aug-2006.)
Assertion
Ref Expression
fovrn  |-  ( ( F : ( R  X.  S ) --> C  /\  A  e.  R  /\  B  e.  S
)  ->  ( A F B )  e.  C
)

Proof of Theorem fovrn
StepHypRef Expression
1 opelxpi 4643 . . 3  |-  ( ( A  e.  R  /\  B  e.  S )  -> 
<. A ,  B >.  e.  ( R  X.  S
) )
2 df-ov 5856 . . . 4  |-  ( A F B )  =  ( F `  <. A ,  B >. )
3 ffvelrn 5629 . . . 4  |-  ( ( F : ( R  X.  S ) --> C  /\  <. A ,  B >.  e.  ( R  X.  S ) )  -> 
( F `  <. A ,  B >. )  e.  C )
42, 3eqeltrid 2257 . . 3  |-  ( ( F : ( R  X.  S ) --> C  /\  <. A ,  B >.  e.  ( R  X.  S ) )  -> 
( A F B )  e.  C )
51, 4sylan2 284 . 2  |-  ( ( F : ( R  X.  S ) --> C  /\  ( A  e.  R  /\  B  e.  S ) )  -> 
( A F B )  e.  C )
653impb 1194 1  |-  ( ( F : ( R  X.  S ) --> C  /\  A  e.  R  /\  B  e.  S
)  ->  ( A F B )  e.  C
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    /\ w3a 973    e. wcel 2141   <.cop 3586    X. cxp 4609   -->wf 5194   ` cfv 5198  (class class class)co 5853
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 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-v 2732  df-sbc 2956  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-fv 5206  df-ov 5856
This theorem is referenced by:  fovrnda  5996  fovrnd  5997  ovmpoelrn  6186  mapxpen  6826  psmetcl  13120  xmetcl  13146  metcl  13147  blssm  13215
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