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Theorem co02 3494
Description: Composition with the empty set. Theorem 20 of [Suppes] p. 63.
Assertion
Ref Expression
co02 |- (A o. (/)) = (/)

Proof of Theorem co02
StepHypRef Expression
1 relco 3470 . 2 |- Rel (A o. (/))
2 rel0 3262 . 2 |- Rel (/)
3 noel 2274 . . . . . . 7 |- -. <.x, z>. e. (/)
4 df-br 2610 . . . . . . 7 |- (x(/)z <-> <.x, z>. e. (/))
53, 4mtbir 192 . . . . . 6 |- -. x(/)z
65intnanr 690 . . . . 5 |- -. (x(/)z /\ zAy)
76nex 1097 . . . 4 |- -. E.z(x(/)z /\ zAy)
8 visset 1804 . . . . 5 |- x e. V
9 visset 1804 . . . . 5 |- y e. V
108, 9opelco 3277 . . . 4 |- (<.x, y>. e. (A o. (/)) <-> E.z(x(/)z /\ zAy))
117, 10mtbir 192 . . 3 |- -. <.x, y>. e. (A o. (/))
12 noel 2274 . . 3 |- -. <.x, y>. e. (/)
1311, 122false 717 . 2 |- (<.x, y>. e. (A o. (/)) <-> <.x, y>. e. (/))
141, 2, 13eqrelriv 3241 1 |- (A o. (/)) = (/)
Colors of variables: wff set class
Syntax hints:   /\ wa 223   = wceq 953   e. wcel 955  E.wex 977  (/)c0 2270  <.cop 2401   class class class wbr 2609   o. ccom 3164
This theorem is referenced by:  co01 3495
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 959  ax-gen 960  ax-8 961  ax-10 963  ax-11 964  ax-12 965  ax-13 966  ax-14 967  ax-17 968  ax-4 970  ax-5o 972  ax-6o 975  ax-9o 1119  ax-10o 1136  ax-16 1206  ax-11o 1213  ax-ext 1452  ax-sep 2693  ax-pow 2732  ax-pr 2769
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 978  df-sb 1168  df-eu 1375  df-mo 1376  df-clab 1457  df-cleq 1462  df-clel 1465  df-ne 1579  df-v 1803  df-dif 2039  df-un 2040  df-in 2041  df-ss 2043  df-nul 2271  df-pw 2392  df-sn 2402  df-pr 2403  df-op 2406  df-br 2610  df-opab 2657  df-xp 3174  df-rel 3175  df-co 3177
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