HomeHome Hilbert Space Explorer < Previous   Next >
Related theorems
Unicode version

Theorem shne0 5372
Description: A non-zero subspace has a non-zero vector.
Hypothesis
Ref Expression
sh0le.1 |- A e. SH
Assertion
Ref Expression
shne0 |- (-. A = 0H <-> E.x e. A -. x = 0v)
Distinct variable group(s):   x,A

Proof of Theorem shne0
StepHypRef Expression
1 sh0le.1 . . . . . 6 |- A e. SH
2 shle0t 5367 . . . . . 6 |- (A e. SH -> (A (_ 0H <-> A = 0H))
31, 2ax-mp 6 . . . . 5 |- (A (_ 0H <-> A = 0H)
43negbii 162 . . . 4 |- (-. A (_ 0H <-> -. A = 0H)
5 nss 1550 . . . 4 |- (-. A (_ 0H <-> E.x(x e. A /\ -. x e. 0H))
64, 5bitr3 153 . . 3 |- (-. A = 0H <-> E.x(x e. A /\ -. x e. 0H))
7 df-rex 1206 . . 3 |- (E.x e. A -. x e. 0H <-> E.x(x e. A /\ -. x e. 0H))
86, 7bitr4 154 . 2 |- (-. A = 0H <-> E.x e. A -. x e. 0H)
9 elch0 5158 . . . 4 |- (x e. 0H <-> x = 0v)
109negbii 162 . . 3 |- (-. x e. 0H <-> -. x = 0v)
1110birex 1224 . 2 |- (E.x e. A -. x e. 0H <-> E.x e. A -. x = 0v)
128, 11bitr 151 1 |- (-. A = 0H <-> E.x e. A -. x = 0v)
Colors of variables: wff set class
Syntax hints:  -. wn 1   <-> wb 127   /\ wa 196  E.wex 678   = wceq 1091   e. wcel 1092  E.wrex 1202   (_ wss 1487  0vc0v 4961  SHcsh 4967  0Hc0h 4974
This theorem is referenced by:  chne0 5375  shatomic 5753
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  ax-hvzercl 4987
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  df-ral 1205  df-rex 1206  df-v 1349  df-un 1490  df-in 1491  df-ss 1492  df-sn 1811  df-pr 1812  df-sh 5114  df-ch0 5157
metamath.org