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| Mirrors > Home > MPE Home > Th. List > axlowdimlem8 | Structured version Visualization version GIF version | ||
| Description: Lemma for axlowdim 29569. Calculate the value of 𝑃 at three. (Contributed by Scott Fenton, 21-Apr-2013.) |
| Ref | Expression |
|---|---|
| axlowdimlem7.1 | ⊢ 𝑃 = ({〈3, -1〉} ∪ (((1...𝑁) ∖ {3}) × {0})) |
| Ref | Expression |
|---|---|
| axlowdimlem8 | ⊢ (𝑃‘3) = -1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | axlowdimlem7.1 | . . 3 ⊢ 𝑃 = ({〈3, -1〉} ∪ (((1...𝑁) ∖ {3}) × {0})) | |
| 2 | 1 | fveq1i 6909 | . 2 ⊢ (𝑃‘3) = (({〈3, -1〉} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) |
| 3 | 3ex 12452 | . . . 4 ⊢ 3 ∈ V | |
| 4 | negex 11582 | . . . 4 ⊢ -1 ∈ V | |
| 5 | 3, 4 | fnsn 6620 | . . 3 ⊢ {〈3, -1〉} Fn {3} |
| 6 | c0ex 11327 | . . . . 5 ⊢ 0 ∈ V | |
| 7 | 6 | fconst 6790 | . . . 4 ⊢ (((1...𝑁) ∖ {3}) × {0}):((1...𝑁) ∖ {3})⟶{0} |
| 8 | ffn 6731 | . . . 4 ⊢ ((((1...𝑁) ∖ {3}) × {0}):((1...𝑁) ∖ {3})⟶{0} → (((1...𝑁) ∖ {3}) × {0}) Fn ((1...𝑁) ∖ {3})) | |
| 9 | 7, 8 | ax-mp 5 | . . 3 ⊢ (((1...𝑁) ∖ {3}) × {0}) Fn ((1...𝑁) ∖ {3}) |
| 10 | disjdif 4429 | . . . 4 ⊢ ({3} ∩ ((1...𝑁) ∖ {3})) = ∅ | |
| 11 | 3 | snid 4623 | . . . 4 ⊢ 3 ∈ {3} |
| 12 | 10, 11 | pm3.2i 476 | . . 3 ⊢ (({3} ∩ ((1...𝑁) ∖ {3})) = ∅ ∧ 3 ∈ {3}) |
| 13 | fvun1 6999 | . . 3 ⊢ (({〈3, -1〉} Fn {3} ∧ (((1...𝑁) ∖ {3}) × {0}) Fn ((1...𝑁) ∖ {3}) ∧ (({3} ∩ ((1...𝑁) ∖ {3})) = ∅ ∧ 3 ∈ {3})) → (({〈3, -1〉} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) = ({〈3, -1〉}‘3)) | |
| 14 | 5, 9, 12, 13 | mp3an 1491 | . 2 ⊢ (({〈3, -1〉} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) = ({〈3, -1〉}‘3) |
| 15 | 3, 4 | fvsn 7209 | . 2 ⊢ ({〈3, -1〉}‘3) = -1 |
| 16 | 2, 14, 15 | 3eqtri 2790 | 1 ⊢ (𝑃‘3) = -1 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2147 ∖ cdif 4048 ∩ cin 4092 ∪ cun 4152 ∅c0 4281 {csn 4588 〈cop 4838 × cxp 5653 Fn wfn 6553 ⟶wf 6554 ‘cfv 6558 (class class class)co 7443 0cc0 11227 1c1 11228 -cneg 11569 3c3 12425 ...cfz 13666 |
| 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-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pr 5395 ax-1cn 11285 ax-icn 11286 ax-addcl 11287 ax-mulcl 11289 ax-i2m1 11295 |
| 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-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 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-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6512 df-fun 6560 df-fn 6561 df-f 6562 df-fv 6566 df-ov 7446 df-neg 11571 df-2 12432 df-3 12433 |
| This theorem is used by: axlowdimlem16 29565 |
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