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Mirrors > Home > MPE Home > Th. List > fsum0diaglem | Structured version Visualization version GIF version |
Description: Lemma for fsum0diag 15719. (Contributed by Mario Carneiro, 28-Apr-2014.) (Revised by Mario Carneiro, 8-Apr-2016.) |
Ref | Expression |
---|---|
fsum0diaglem | ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (𝑘 ∈ (0...𝑁) ∧ 𝑗 ∈ (0...(𝑁 − 𝑘)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elfzle1 13500 | . . . . . . 7 ⊢ (𝑗 ∈ (0...𝑁) → 0 ≤ 𝑗) | |
2 | 1 | adantr 481 | . . . . . 6 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 0 ≤ 𝑗) |
3 | elfz3nn0 13591 | . . . . . . . . . 10 ⊢ (𝑗 ∈ (0...𝑁) → 𝑁 ∈ ℕ0) | |
4 | 3 | adantr 481 | . . . . . . . . 9 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑁 ∈ ℕ0) |
5 | 4 | nn0zd 12580 | . . . . . . . 8 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑁 ∈ ℤ) |
6 | 5 | zred 12662 | . . . . . . 7 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑁 ∈ ℝ) |
7 | elfzelz 13497 | . . . . . . . . 9 ⊢ (𝑗 ∈ (0...𝑁) → 𝑗 ∈ ℤ) | |
8 | 7 | adantr 481 | . . . . . . . 8 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑗 ∈ ℤ) |
9 | 8 | zred 12662 | . . . . . . 7 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑗 ∈ ℝ) |
10 | 6, 9 | subge02d 11802 | . . . . . 6 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (0 ≤ 𝑗 ↔ (𝑁 − 𝑗) ≤ 𝑁)) |
11 | 2, 10 | mpbid 231 | . . . . 5 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (𝑁 − 𝑗) ≤ 𝑁) |
12 | 5, 8 | zsubcld 12667 | . . . . . 6 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (𝑁 − 𝑗) ∈ ℤ) |
13 | eluz 12832 | . . . . . 6 ⊢ (((𝑁 − 𝑗) ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑁 ∈ (ℤ≥‘(𝑁 − 𝑗)) ↔ (𝑁 − 𝑗) ≤ 𝑁)) | |
14 | 12, 5, 13 | syl2anc 584 | . . . . 5 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (𝑁 ∈ (ℤ≥‘(𝑁 − 𝑗)) ↔ (𝑁 − 𝑗) ≤ 𝑁)) |
15 | 11, 14 | mpbird 256 | . . . 4 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑁 ∈ (ℤ≥‘(𝑁 − 𝑗))) |
16 | fzss2 13537 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘(𝑁 − 𝑗)) → (0...(𝑁 − 𝑗)) ⊆ (0...𝑁)) | |
17 | 15, 16 | syl 17 | . . 3 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (0...(𝑁 − 𝑗)) ⊆ (0...𝑁)) |
18 | simpr 485 | . . 3 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑘 ∈ (0...(𝑁 − 𝑗))) | |
19 | 17, 18 | sseldd 3982 | . 2 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑘 ∈ (0...𝑁)) |
20 | elfzelz 13497 | . . . . . 6 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑗)) → 𝑘 ∈ ℤ) | |
21 | 20 | adantl 482 | . . . . 5 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑘 ∈ ℤ) |
22 | 21 | zred 12662 | . . . 4 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑘 ∈ ℝ) |
23 | elfzle2 13501 | . . . . 5 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑗)) → 𝑘 ≤ (𝑁 − 𝑗)) | |
24 | 23 | adantl 482 | . . . 4 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑘 ≤ (𝑁 − 𝑗)) |
25 | 22, 6, 9, 24 | lesubd 11814 | . . 3 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑗 ≤ (𝑁 − 𝑘)) |
26 | elfzuz 13493 | . . . . 5 ⊢ (𝑗 ∈ (0...𝑁) → 𝑗 ∈ (ℤ≥‘0)) | |
27 | 26 | adantr 481 | . . . 4 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑗 ∈ (ℤ≥‘0)) |
28 | 5, 21 | zsubcld 12667 | . . . 4 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (𝑁 − 𝑘) ∈ ℤ) |
29 | elfz5 13489 | . . . 4 ⊢ ((𝑗 ∈ (ℤ≥‘0) ∧ (𝑁 − 𝑘) ∈ ℤ) → (𝑗 ∈ (0...(𝑁 − 𝑘)) ↔ 𝑗 ≤ (𝑁 − 𝑘))) | |
30 | 27, 28, 29 | syl2anc 584 | . . 3 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (𝑗 ∈ (0...(𝑁 − 𝑘)) ↔ 𝑗 ≤ (𝑁 − 𝑘))) |
31 | 25, 30 | mpbird 256 | . 2 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → 𝑗 ∈ (0...(𝑁 − 𝑘))) |
32 | 19, 31 | jca 512 | 1 ⊢ ((𝑗 ∈ (0...𝑁) ∧ 𝑘 ∈ (0...(𝑁 − 𝑗))) → (𝑘 ∈ (0...𝑁) ∧ 𝑗 ∈ (0...(𝑁 − 𝑘)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∈ wcel 2106 ⊆ wss 3947 class class class wbr 5147 ‘cfv 6540 (class class class)co 7405 0cc0 11106 ≤ cle 11245 − cmin 11440 ℕ0cn0 12468 ℤcz 12554 ℤ≥cuz 12818 ...cfz 13480 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-n0 12469 df-z 12555 df-uz 12819 df-fz 13481 |
This theorem is referenced by: fsum0diag 15719 fprod0diag 15926 |
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