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| Mirrors > Home > HSE Home > Th. List > lnfn0 | Structured version Visualization version GIF version | ||
| Description: The value of a linear Hilbert space functional at zero is zero. Remark in [Beran] p. 99. (Contributed by NM, 25-Apr-2006.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| lnfn0 | ⊢ (𝑇 ∈ LinFn → (𝑇‘0ℎ) = 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq1 6867 | . . 3 ⊢ (𝑇 = if(𝑇 ∈ LinFn, 𝑇, ( ℋ × {0})) → (𝑇‘0ℎ) = (if(𝑇 ∈ LinFn, 𝑇, ( ℋ × {0}))‘0ℎ)) | |
| 2 | 1 | eqeq1d 2765 | . 2 ⊢ (𝑇 = if(𝑇 ∈ LinFn, 𝑇, ( ℋ × {0})) → ((𝑇‘0ℎ) = 0 ↔ (if(𝑇 ∈ LinFn, 𝑇, ( ℋ × {0}))‘0ℎ) = 0)) |
| 3 | 0lnfn 32189 | . . . 4 ⊢ ( ℋ × {0}) ∈ LinFn | |
| 4 | 3 | elimel 4551 | . . 3 ⊢ if(𝑇 ∈ LinFn, 𝑇, ( ℋ × {0})) ∈ LinFn |
| 5 | 4 | lnfn0i 32246 | . 2 ⊢ (if(𝑇 ∈ LinFn, 𝑇, ( ℋ × {0}))‘0ℎ) = 0 |
| 6 | 2, 5 | dedth 4540 | 1 ⊢ (𝑇 ∈ LinFn → (𝑇‘0ℎ) = 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1561 ∈ wcel 2143 ifcif 4481 {csn 4583 × cxp 5646 ‘cfv 6522 0cc0 11074 ℋchba 31123 0ℎc0v 31128 LinFnclf 31158 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7719 ax-cnex 11130 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-i2m1 11142 ax-1ne0 11143 ax-1rid 11144 ax-rnegex 11145 ax-rrecex 11146 ax-cnre 11147 ax-pre-lttri 11148 ax-pre-lttrn 11149 ax-pre-ltadd 11150 ax-hilex 31203 ax-hfvadd 31204 ax-hv0cl 31207 ax-hvaddid 31208 ax-hfvmul 31209 ax-hvmulid 31210 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5102 df-opab 5164 df-mpt 5183 df-id 5543 df-po 5556 df-so 5557 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-iota 6478 df-fun 6524 df-fn 6525 df-f 6526 df-f1 6527 df-fo 6528 df-f1o 6529 df-fv 6530 df-riota 7354 df-ov 7400 df-oprab 7401 df-mpo 7402 df-er 8679 df-map 8811 df-en 8929 df-dom 8930 df-sdom 8931 df-pnf 11219 df-mnf 11220 df-ltxr 11222 df-sub 11417 df-lnfn 32052 |
| This theorem is referenced by: (None) |
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