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| Mirrors > Home > HSE Home > Th. List > shne0i | Structured version Visualization version GIF version | ||
| Description: A nonzero subspace has a nonzero vector. (Contributed by NM, 25-Feb-2006.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| shne0.1 | ⊢ 𝐴 ∈ Sℋ |
| Ref | Expression |
|---|---|
| shne0i | ⊢ (𝐴 ≠ 0ℋ ↔ ∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ne 2965 | . 2 ⊢ (𝐴 ≠ 0ℋ ↔ ¬ 𝐴 = 0ℋ) | |
| 2 | df-rex 3096 | . . 3 ⊢ (∃𝑥 ∈ 𝐴 ¬ 𝑥 ∈ 0ℋ ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ ¬ 𝑥 ∈ 0ℋ)) | |
| 3 | nss 4009 | . . 3 ⊢ (¬ 𝐴 ⊆ 0ℋ ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ ¬ 𝑥 ∈ 0ℋ)) | |
| 4 | shne0.1 | . . . . 5 ⊢ 𝐴 ∈ Sℋ | |
| 5 | shle0 31735 | . . . . 5 ⊢ (𝐴 ∈ Sℋ → (𝐴 ⊆ 0ℋ ↔ 𝐴 = 0ℋ)) | |
| 6 | 4, 5 | ax-mp 5 | . . . 4 ⊢ (𝐴 ⊆ 0ℋ ↔ 𝐴 = 0ℋ) |
| 7 | 6 | notbii 323 | . . 3 ⊢ (¬ 𝐴 ⊆ 0ℋ ↔ ¬ 𝐴 = 0ℋ) |
| 8 | 2, 3, 7 | 3bitr2ri 303 | . 2 ⊢ (¬ 𝐴 = 0ℋ ↔ ∃𝑥 ∈ 𝐴 ¬ 𝑥 ∈ 0ℋ) |
| 9 | elch0 31547 | . . . 4 ⊢ (𝑥 ∈ 0ℋ ↔ 𝑥 = 0ℎ) | |
| 10 | 9 | necon3bbii 3011 | . . 3 ⊢ (¬ 𝑥 ∈ 0ℋ ↔ 𝑥 ≠ 0ℎ) |
| 11 | 10 | rexbii 3118 | . 2 ⊢ (∃𝑥 ∈ 𝐴 ¬ 𝑥 ∈ 0ℋ ↔ ∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ) |
| 12 | 1, 8, 11 | 3bitri 300 | 1 ⊢ (𝐴 ≠ 0ℋ ↔ ∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 209 ∧ wa 400 = wceq 1567 ∃wex 1806 ∈ wcel 2149 ≠ wne 2964 ∃wrex 3095 ⊆ wss 3913 0ℎc0v 31217 Sℋ csh 31221 0ℋc0h 31228 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-hilex 31292 ax-hv0cl 31296 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-br 5114 df-opab 5178 df-xp 5668 df-cnv 5670 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-sh 31500 df-ch0 31546 |
| This theorem is referenced by: chne0i 31746 shatomici 32651 |
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