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Theorem chne0i 32082
Description: A nonzero closed subspace has a nonzero vector. (Contributed by NM, 25-Feb-2006.) (New usage is discouraged.)
Hypothesis
Ref Expression
ch0le.1 𝐴 ∈ Cℋ
Assertion
Ref Expression
chne0i (𝐴 ≠ 0ℋ ↔ ∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ)
Distinct variable group:   𝑥,𝐴

Proof of Theorem chne0i
StepHypRef Expression
1 ch0le.1 . . 3 𝐴 ∈ Cℋ
21chshii 31856 . 2 𝐴 ∈ Sℋ
32shne0i 32077 1 (𝐴 ≠ 0ℋ ↔ ∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ↔ wb 209   ∈ wcel 2147   ≠ wne 2959  ∃wrex 3090  0ℎc0v 31553   Cℋ cch 31558  0ℋc0h 31564
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-ext 2735  ax-sep 5252  ax-hilex 31628  ax-hv0cl 31632
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ne 2960  df-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-br 5107  df-opab 5171  df-xp 5661  df-cnv 5663  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-iota 6509  df-fv 6563  df-ov 7443  df-sh 31836  df-ch 31850  df-ch0 31882
This theorem is used by:  chne0  32123  hne0  32176  h1datomi  32210  riesz3i  32691  pjnmopi  32777
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