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| Mirrors > Home > MPE Home > Th. List > axlowdimlem8 | Structured version Visualization version GIF version | ||
| Description: Lemma for axlowdim 29521. 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 6878 | . 2 ⊢ (𝑃‘3) = (({〈3, -1〉} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) |
| 3 | 3ex 12406 | . . . 4 ⊢ 3 ∈ V | |
| 4 | negex 11536 | . . . 4 ⊢ -1 ∈ V | |
| 5 | 3, 4 | fnsn 6590 | . . 3 ⊢ {〈3, -1〉} Fn {3} |
| 6 | c0ex 11281 | . . . . 5 ⊢ 0 ∈ V | |
| 7 | 6 | fconst 6760 | . . . 4 ⊢ (((1...𝑁) ∖ {3}) × {0}):((1...𝑁) ∖ {3})⟶{0} |
| 8 | ffn 6701 | . . . 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 4426 | . . . 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 6968 | . . 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 1490 | . 2 ⊢ (({〈3, -1〉} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) = ({〈3, -1〉}‘3) |
| 15 | 3, 4 | fvsn 7178 | . 2 ⊢ ({〈3, -1〉}‘3) = -1 |
| 16 | 2, 14, 15 | 3eqtri 2788 | 1 ⊢ (𝑃‘3) = -1 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∖ cdif 3896 ∪ cun 3897 ∩ cin 3898 ∅c0 4279 {csn 4584 〈cop 4590 × cxp 5649 Fn wfn 6526 ⟶wf 6527 ‘cfv 6531 (class class class)co 7412 0cc0 11181 1c1 11182 -cneg 11523 3c3 12379 ...cfz 13620 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-mulcl 11243 ax-i2m1 11249 |
| 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 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-fv 6539 df-ov 7415 df-neg 11525 df-2 12386 df-3 12387 |
| This theorem is used by: axlowdimlem16 29517 |
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