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Theorem sh2 5126
Description: Subspace H of a Hilbert space.
Assertion
Ref Expression
sh2 |- (H (_ H~ -> (H e. SH <-> (0v e. H /\ (A.x e. H A.y e. H (x +v y) e. H /\ A.x e. CC A.y e. H (x .s y) e. H))))
Distinct variable group(s):   x,y,H

Proof of Theorem sh2
StepHypRef Expression
1 anass 336 . . 3 |- (((H (_ H~ /\ 0v e. H) /\ (A.x e. H A.y e. H (x +v y) e. H /\ A.x e. CC A.y e. H (x .s y) e. H)) <-> (H (_ H~ /\ (0v e. H /\ (A.x e. H A.y e. H (x +v y) e. H /\ A.x e. CC A.y e. H (x .s y) e. H))))
21baib 506 . 2 |- (H (_ H~ -> (((H (_ H~ /\ 0v e. H) /\ (A.x e. H A.y e. H (x +v y) e. H /\ A.x e. CC A.y e. H (x .s y) e. H)) <-> (0v e. H /\ (A.x e. H A.y e. H (x +v y) e. H /\ A.x e. CC A.y e. H (x .s y) e. H))))
3 sh 5116 . 2 |- (H e. SH <-> ((H (_ H~ /\ 0v e. H) /\ (A.x e. H A.y e. H (x +v y) e. H /\ A.x e. CC A.y e. H (x .s y) e. H)))
42, 3syl5bb 410 1 |- (H (_ H~ -> (H e. SH <-> (0v e. H /\ (A.x e. H A.y e. H (x +v y) e. H /\ A.x e. CC A.y e. H (x .s y) e. H))))
Colors of variables: wff set class
Syntax hints:   -> wi 2   <-> wb 127   /\ wa 196   e. wcel 1092  A.wral 1201   (_ wss 1487  (class class class)co 3001  CCcc 4026  H~chil 4958   +v cva 4959   .s csm 4960  0vc0v 4961  SHcsh 4967
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-hilex 4983
This theorem depends on definitions:  df-bi 128  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  df-ral 1205  df-v 1349  df-in 1491  df-ss 1492  df-sh 5114
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