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| Mirrors > Home > HSE Home > Th. List > nmopgt0 | Structured version Visualization version GIF version | ||
| Description: A linear Hilbert space operator that is not identically zero has a positive norm. (Contributed by NM, 9-Feb-2006.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| nmopgt0 | ⊢ (𝑇: ℋ⟶ ℋ → ((normop‘𝑇) ≠ 0 ↔ 0 < (normop‘𝑇))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nmopxr 32188 | . . 3 ⊢ (𝑇: ℋ⟶ ℋ → (normop‘𝑇) ∈ ℝ*) | |
| 2 | nmopge0 32233 | . . 3 ⊢ (𝑇: ℋ⟶ ℋ → 0 ≤ (normop‘𝑇)) | |
| 3 | 0xr 11259 | . . . 4 ⊢ 0 ∈ ℝ* | |
| 4 | xrleltne 13173 | . . . 4 ⊢ ((0 ∈ ℝ* ∧ (normop‘𝑇) ∈ ℝ* ∧ 0 ≤ (normop‘𝑇)) → (0 < (normop‘𝑇) ↔ (normop‘𝑇) ≠ 0)) | |
| 5 | 3, 4 | mp3an1 1475 | . . 3 ⊢ (((normop‘𝑇) ∈ ℝ* ∧ 0 ≤ (normop‘𝑇)) → (0 < (normop‘𝑇) ↔ (normop‘𝑇) ≠ 0)) |
| 6 | 1, 2, 5 | syl2anc 595 | . 2 ⊢ (𝑇: ℋ⟶ ℋ → (0 < (normop‘𝑇) ↔ (normop‘𝑇) ≠ 0)) |
| 7 | 6 | bicomd 226 | 1 ⊢ (𝑇: ℋ⟶ ℋ → ((normop‘𝑇) ≠ 0 ↔ 0 < (normop‘𝑇))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∈ wcel 2150 ≠ wne 2965 class class class wbr 5114 ⟶wf 6536 ‘cfv 6540 0cc0 11103 ℝ*cxr 11245 < clt 11246 ≤ cle 11247 ℋchba 31241 normopcnop 31267 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5340 ax-pr 5408 ax-un 7736 ax-cnex 11159 ax-resscn 11160 ax-1cn 11161 ax-icn 11162 ax-addcl 11163 ax-addrcl 11164 ax-mulcl 11165 ax-mulrcl 11166 ax-mulcom 11167 ax-addass 11168 ax-mulass 11169 ax-distr 11170 ax-i2m1 11171 ax-1ne0 11172 ax-1rid 11173 ax-rnegex 11174 ax-rrecex 11175 ax-cnre 11176 ax-pre-lttri 11177 ax-pre-lttrn 11178 ax-pre-ltadd 11179 ax-pre-mulgt0 11180 ax-pre-sup 11181 ax-hilex 31321 ax-hfvadd 31322 ax-hvcom 31323 ax-hvass 31324 ax-hv0cl 31325 ax-hvaddid 31326 ax-hfvmul 31327 ax-hvmulid 31328 ax-hvmulass 31329 ax-hvdistr1 31330 ax-hvdistr2 31331 ax-hvmul0 31332 ax-hfi 31401 ax-his1 31404 ax-his2 31405 ax-his3 31406 ax-his4 31407 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-eu 2604 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ne 2966 df-nel 3072 df-ral 3087 df-rex 3097 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5560 df-eprel 5565 df-po 5573 df-so 5574 df-fr 5618 df-we 5620 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-er 8697 df-map 8829 df-en 8947 df-dom 8948 df-sdom 8949 df-sup 9405 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11446 df-neg 11447 df-div 11875 df-nn 12237 df-2 12306 df-3 12307 df-4 12308 df-n0 12508 df-z 12595 df-uz 12866 df-rp 13020 df-seq 14041 df-exp 14101 df-cj 15153 df-re 15154 df-im 15155 df-sqrt 15289 df-abs 15290 df-grpo 30815 df-gid 30816 df-ablo 30867 df-vc 30881 df-nv 30914 df-va 30917 df-ba 30918 df-sm 30919 df-0v 30920 df-nmcv 30922 df-hnorm 31290 df-hba 31291 df-hvsub 31293 df-nmop 32161 |
| This theorem is referenced by: nmlnopgt0i 32319 nmopcoi 32417 nmopleid 32461 |
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