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| Mirrors > Home > MPE Home > Th. List > axlowdimlem8 | Structured version Visualization version GIF version | ||
| Description: Lemma for axlowdim 29426. 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 6883 | . 2 ⊢ (𝑃‘3) = (({〈3, -1〉} ∪ (((1...𝑁) ∖ {3}) × {0}))‘3) |
| 3 | 3ex 12351 | . . . 4 ⊢ 3 ∈ V | |
| 4 | negex 11483 | . . . 4 ⊢ -1 ∈ V | |
| 5 | 3, 4 | fnsn 6595 | . . 3 ⊢ {〈3, -1〉} Fn {3} |
| 6 | c0ex 11228 | . . . . 5 ⊢ 0 ∈ V | |
| 7 | 6 | fconst 6765 | . . . 4 ⊢ (((1...𝑁) ∖ {3}) × {0}):((1...𝑁) ∖ {3})⟶{0} |
| 8 | ffn 6706 | . . . 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 4626 | . . . 4 ⊢ 3 ∈ {3} |
| 12 | 10, 11 | pm3.2i 476 | . . 3 ⊢ (({3} ∩ ((1...𝑁) ∖ {3})) = ∅ ∧ 3 ∈ {3}) |
| 13 | fvun1 6973 | . . 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 7183 | . 2 ⊢ ({〈3, -1〉}‘3) = -1 |
| 16 | 2, 14, 15 | 3eqtri 2789 | 1 ⊢ (𝑃‘3) = -1 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∖ cdif 3899 ∪ cun 3900 ∩ cin 3901 ∅c0 4282 {csn 4587 〈cop 4593 × cxp 5657 Fn wfn 6532 ⟶wf 6533 ‘cfv 6537 (class class class)co 7417 0cc0 11128 1c1 11129 -cneg 11470 3c3 12324 ...cfz 13565 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pr 5402 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-mulcl 11190 ax-i2m1 11196 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-fv 6545 df-ov 7420 df-neg 11472 df-2 12331 df-3 12332 |
| This theorem is used by: axlowdimlem16 29422 |
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