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Theorem imainss 4767
Description: An upper bound for intersection with an image. Theorem 41 of [Suppes] p. 66. (Contributed by NM, 11-Aug-2004.)
Assertion
Ref Expression
imainss  |-  ( ( R " A )  i^i  B )  C_  ( R " ( A  i^i  ( `' R " B ) ) )

Proof of Theorem imainss
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 vex 2577 . . . . . . . . . . 11  |-  y  e. 
_V
2 vex 2577 . . . . . . . . . . 11  |-  x  e. 
_V
31, 2brcnv 4546 . . . . . . . . . 10  |-  ( y `' R x  <->  x R
y )
4 19.8a 1498 . . . . . . . . . 10  |-  ( ( y  e.  B  /\  y `' R x )  ->  E. y ( y  e.  B  /\  y `' R x ) )
53, 4sylan2br 276 . . . . . . . . 9  |-  ( ( y  e.  B  /\  x R y )  ->  E. y ( y  e.  B  /\  y `' R x ) )
65ancoms 259 . . . . . . . 8  |-  ( ( x R y  /\  y  e.  B )  ->  E. y ( y  e.  B  /\  y `' R x ) )
76anim2i 328 . . . . . . 7  |-  ( ( x  e.  A  /\  ( x R y  /\  y  e.  B
) )  ->  (
x  e.  A  /\  E. y ( y  e.  B  /\  y `' R x ) ) )
8 simprl 491 . . . . . . 7  |-  ( ( x  e.  A  /\  ( x R y  /\  y  e.  B
) )  ->  x R y )
97, 8jca 294 . . . . . 6  |-  ( ( x  e.  A  /\  ( x R y  /\  y  e.  B
) )  ->  (
( x  e.  A  /\  E. y ( y  e.  B  /\  y `' R x ) )  /\  x R y ) )
109anassrs 386 . . . . 5  |-  ( ( ( x  e.  A  /\  x R y )  /\  y  e.  B
)  ->  ( (
x  e.  A  /\  E. y ( y  e.  B  /\  y `' R x ) )  /\  x R y ) )
11 elin 3154 . . . . . . 7  |-  ( x  e.  ( A  i^i  ( `' R " B ) )  <->  ( x  e.  A  /\  x  e.  ( `' R " B ) ) )
122elima2 4702 . . . . . . . 8  |-  ( x  e.  ( `' R " B )  <->  E. y
( y  e.  B  /\  y `' R x ) )
1312anbi2i 438 . . . . . . 7  |-  ( ( x  e.  A  /\  x  e.  ( `' R " B ) )  <-> 
( x  e.  A  /\  E. y ( y  e.  B  /\  y `' R x ) ) )
1411, 13bitri 177 . . . . . 6  |-  ( x  e.  ( A  i^i  ( `' R " B ) )  <->  ( x  e.  A  /\  E. y
( y  e.  B  /\  y `' R x ) ) )
1514anbi1i 439 . . . . 5  |-  ( ( x  e.  ( A  i^i  ( `' R " B ) )  /\  x R y )  <->  ( (
x  e.  A  /\  E. y ( y  e.  B  /\  y `' R x ) )  /\  x R y ) )
1610, 15sylibr 141 . . . 4  |-  ( ( ( x  e.  A  /\  x R y )  /\  y  e.  B
)  ->  ( x  e.  ( A  i^i  ( `' R " B ) )  /\  x R y ) )
1716eximi 1507 . . 3  |-  ( E. x ( ( x  e.  A  /\  x R y )  /\  y  e.  B )  ->  E. x ( x  e.  ( A  i^i  ( `' R " B ) )  /\  x R y ) )
181elima2 4702 . . . . 5  |-  ( y  e.  ( R " A )  <->  E. x
( x  e.  A  /\  x R y ) )
1918anbi1i 439 . . . 4  |-  ( ( y  e.  ( R
" A )  /\  y  e.  B )  <->  ( E. x ( x  e.  A  /\  x R y )  /\  y  e.  B )
)
20 elin 3154 . . . 4  |-  ( y  e.  ( ( R
" A )  i^i 
B )  <->  ( y  e.  ( R " A
)  /\  y  e.  B ) )
21 19.41v 1798 . . . 4  |-  ( E. x ( ( x  e.  A  /\  x R y )  /\  y  e.  B )  <->  ( E. x ( x  e.  A  /\  x R y )  /\  y  e.  B )
)
2219, 20, 213bitr4i 205 . . 3  |-  ( y  e.  ( ( R
" A )  i^i 
B )  <->  E. x
( ( x  e.  A  /\  x R y )  /\  y  e.  B ) )
231elima2 4702 . . 3  |-  ( y  e.  ( R "
( A  i^i  ( `' R " B ) ) )  <->  E. x
( x  e.  ( A  i^i  ( `' R " B ) )  /\  x R y ) )
2417, 22, 233imtr4i 194 . 2  |-  ( y  e.  ( ( R
" A )  i^i 
B )  ->  y  e.  ( R " ( A  i^i  ( `' R " B ) ) ) )
2524ssriv 2977 1  |-  ( ( R " A )  i^i  B )  C_  ( R " ( A  i^i  ( `' R " B ) ) )
Colors of variables: wff set class
Syntax hints:    /\ wa 101   E.wex 1397    e. wcel 1409    i^i cin 2944    C_ wss 2945   class class class wbr 3792   `'ccnv 4372   "cima 4376
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 103  ax-ia2 104  ax-ia3 105  ax-io 640  ax-5 1352  ax-7 1353  ax-gen 1354  ax-ie1 1398  ax-ie2 1399  ax-8 1411  ax-10 1412  ax-11 1413  ax-i12 1414  ax-bndl 1415  ax-4 1416  ax-14 1421  ax-17 1435  ax-i9 1439  ax-ial 1443  ax-i5r 1444  ax-ext 2038  ax-sep 3903  ax-pow 3955  ax-pr 3972
This theorem depends on definitions:  df-bi 114  df-3an 898  df-tru 1262  df-nf 1366  df-sb 1662  df-eu 1919  df-mo 1920  df-clab 2043  df-cleq 2049  df-clel 2052  df-nfc 2183  df-ral 2328  df-rex 2329  df-v 2576  df-un 2950  df-in 2952  df-ss 2959  df-pw 3389  df-sn 3409  df-pr 3410  df-op 3412  df-br 3793  df-opab 3847  df-xp 4379  df-cnv 4381  df-dm 4383  df-rn 4384  df-res 4385  df-ima 4386
This theorem is referenced by: (None)
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