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Theorem ssoprab2i 4008
Description: Inference of operation class abstraction subclass from implication.
Hypothesis
Ref Expression
ssoprab2i.1 |- (ph -> ps)
Assertion
Ref Expression
ssoprab2i |- {<.<.x, y>., z>. | ph} (_ {<.<.x, y>., z>. | ps}
Distinct variable group:   x,y,z

Proof of Theorem ssoprab2i
StepHypRef Expression
1 ssoprab2i.1 . . . . 5 |- (ph -> ps)
21anim2i 335 . . . 4 |- ((w = <.x, y>. /\ ph) -> (w = <.x, y>. /\ ps))
3219.22i2 1041 . . 3 |- (E.xE.y(w = <.x, y>. /\ ph) -> E.xE.y(w = <.x, y>. /\ ps))
43ssopab2i 2823 . 2 |- {<.w, z>. | E.xE.y(w = <.x, y>. /\ ph)} (_ {<.w, z>. | E.xE.y(w = <.x, y>. /\ ps)}
5 dfoprab2 3991 . 2 |- {<.<.x, y>., z>. | ph} = {<.w, z>. | E.xE.y(w = <.x, y>. /\ ph)}
6 dfoprab2 3991 . 2 |- {<.<.x, y>., z>. | ps} = {<.w, z>. | E.xE.y(w = <.x, y>. /\ ps)}
74, 5, 63sstr4 2100 1 |- {<.<.x, y>., z>. | ph} (_ {<.<.x, y>., z>. | ps}
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 223   = wceq 956  E.wex 980   (_ wss 2047  <.cop 2411  {copab 2666  {copab2 3964
This theorem is referenced by:  blfval 7835  nvvcop 8213
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 962  ax-gen 963  ax-8 964  ax-10 966  ax-11 967  ax-12 968  ax-13 969  ax-14 970  ax-17 971  ax-4 973  ax-5o 975  ax-6o 978  ax-9o 1123  ax-10o 1140  ax-16 1210  ax-11o 1218  ax-ext 1459  ax-sep 2703  ax-pow 2742  ax-pr 2779
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 981  df-sb 1172  df-eu 1382  df-mo 1383  df-clab 1464  df-cleq 1469  df-clel 1472  df-ne 1587  df-v 1812  df-dif 2049  df-un 2050  df-in 2051  df-ss 2053  df-nul 2281  df-pw 2402  df-sn 2412  df-pr 2413  df-op 2416  df-opab 2667  df-oprab 3966
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