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Theorem ssoprab2i 3993
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 1037 . . 3 |- (E.xE.y(w = <.x, y>. /\ ph) -> E.xE.y(w = <.x, y>. /\ ps))
43ssopab2i 2812 . 2 |- {<.w, z>. | E.xE.y(w = <.x, y>. /\ ph)} (_ {<.w, z>. | E.xE.y(w = <.x, y>. /\ ps)}
5 dfoprab2 3976 . 2 |- {<.<.x, y>., z>. | ph} = {<.w, z>. | E.xE.y(w = <.x, y>. /\ ph)}
6 dfoprab2 3976 . 2 |- {<.<.x, y>., z>. | ps} = {<.w, z>. | E.xE.y(w = <.x, y>. /\ ps)}
74, 5, 63sstr4 2090 1 |- {<.<.x, y>., z>. | ph} (_ {<.<.x, y>., z>. | ps}
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 223   = wceq 953  E.wex 977   (_ wss 2037  <.cop 2401  {copab 2656  {copab2 3949
This theorem is referenced by:  blfval 7775  nvvcop 8151
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-opab 2657  df-oprab 3951
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