ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  co02 Unicode version

Theorem co02 5250
Description: Composition with the empty set. Theorem 20 of [Suppes] p. 63. (Contributed by NM, 24-Apr-2004.)
Assertion
Ref Expression
co02  |-  ( A  o.  (/) )  =  (/)

Proof of Theorem co02
Dummy variables  x  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 relco 5235 . 2  |-  Rel  ( A  o.  (/) )
2 rel0 4852 . 2  |-  Rel  (/)
3 noel 3498 . . . . . . 7  |-  -.  <. x ,  z >.  e.  (/)
4 df-br 4089 . . . . . . 7  |-  ( x
(/) z  <->  <. x ,  z >.  e.  (/) )
53, 4mtbir 677 . . . . . 6  |-  -.  x (/) z
65intnanr 937 . . . . 5  |-  -.  (
x (/) z  /\  z A y )
76nex 1548 . . . 4  |-  -.  E. z ( x (/) z  /\  z A y )
8 vex 2805 . . . . 5  |-  x  e. 
_V
9 vex 2805 . . . . 5  |-  y  e. 
_V
108, 9opelco 4902 . . . 4  |-  ( <.
x ,  y >.  e.  ( A  o.  (/) )  <->  E. z
( x (/) z  /\  z A y ) )
117, 10mtbir 677 . . 3  |-  -.  <. x ,  y >.  e.  ( A  o.  (/) )
12 noel 3498 . . 3  |-  -.  <. x ,  y >.  e.  (/)
1311, 122false 708 . 2  |-  ( <.
x ,  y >.  e.  ( A  o.  (/) )  <->  <. x ,  y >.  e.  (/) )
141, 2, 13eqrelriiv 4820 1  |-  ( A  o.  (/) )  =  (/)
Colors of variables: wff set class
Syntax hints:    /\ wa 104    = wceq 1397   E.wex 1540    e. wcel 2202   (/)c0 3494   <.cop 3672   class class class wbr 4088    o. ccom 4729
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 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089  df-opab 4151  df-xp 4731  df-rel 4732  df-co 4734
This theorem is referenced by:  co01  5251  gsumwmhm  13582  gfsumval  16683
  Copyright terms: Public domain W3C validator