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Mirrors > Home > ILE Home > Th. List > Mathboxes > supfz | GIF version |
Description: The supremum of a finite sequence of integers. (Contributed by Scott Fenton, 8-Aug-2013.) (Revised by Jim Kingdon, 15-Oct-2022.) |
Ref | Expression |
---|---|
supfz | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → sup((𝑀...𝑁), ℤ, < ) = 𝑁) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simprl 529 | . . . 4 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ (𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ)) → 𝑥 ∈ ℤ) | |
2 | 1 | zred 9371 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ (𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ)) → 𝑥 ∈ ℝ) |
3 | simprr 531 | . . . 4 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ (𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ)) → 𝑦 ∈ ℤ) | |
4 | 3 | zred 9371 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ (𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ)) → 𝑦 ∈ ℝ) |
5 | 2, 4 | lttri3d 8068 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ (𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ)) → (𝑥 = 𝑦 ↔ (¬ 𝑥 < 𝑦 ∧ ¬ 𝑦 < 𝑥))) |
6 | eluzelz 9533 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
7 | eluzfz2 10027 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ (𝑀...𝑁)) | |
8 | elfzle2 10023 | . . . 4 ⊢ (𝑧 ∈ (𝑀...𝑁) → 𝑧 ≤ 𝑁) | |
9 | 8 | adantl 277 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝑧 ∈ (𝑀...𝑁)) → 𝑧 ≤ 𝑁) |
10 | elfzelz 10020 | . . . . 5 ⊢ (𝑧 ∈ (𝑀...𝑁) → 𝑧 ∈ ℤ) | |
11 | 10 | zred 9371 | . . . 4 ⊢ (𝑧 ∈ (𝑀...𝑁) → 𝑧 ∈ ℝ) |
12 | 6 | zred 9371 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℝ) |
13 | lenlt 8029 | . . . 4 ⊢ ((𝑧 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (𝑧 ≤ 𝑁 ↔ ¬ 𝑁 < 𝑧)) | |
14 | 11, 12, 13 | syl2anr 290 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝑧 ∈ (𝑀...𝑁)) → (𝑧 ≤ 𝑁 ↔ ¬ 𝑁 < 𝑧)) |
15 | 9, 14 | mpbid 147 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ 𝑧 ∈ (𝑀...𝑁)) → ¬ 𝑁 < 𝑧) |
16 | 5, 6, 7, 15 | supmaxti 7000 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → sup((𝑀...𝑁), ℤ, < ) = 𝑁) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1353 ∈ wcel 2148 class class class wbr 4002 ‘cfv 5215 (class class class)co 5872 supcsup 6978 ℝcr 7807 < clt 7988 ≤ cle 7989 ℤcz 9249 ℤ≥cuz 9524 ...cfz 10004 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-sep 4120 ax-pow 4173 ax-pr 4208 ax-un 4432 ax-setind 4535 ax-cnex 7899 ax-resscn 7900 ax-pre-ltirr 7920 ax-pre-apti 7923 |
This theorem depends on definitions: df-bi 117 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rmo 2463 df-rab 2464 df-v 2739 df-sbc 2963 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-br 4003 df-opab 4064 df-mpt 4065 df-id 4292 df-xp 4631 df-rel 4632 df-cnv 4633 df-co 4634 df-dm 4635 df-rn 4636 df-res 4637 df-ima 4638 df-iota 5177 df-fun 5217 df-fn 5218 df-f 5219 df-fv 5223 df-riota 5828 df-ov 5875 df-oprab 5876 df-mpo 5877 df-sup 6980 df-pnf 7990 df-mnf 7991 df-xr 7992 df-ltxr 7993 df-le 7994 df-neg 8127 df-z 9250 df-uz 9525 df-fz 10005 |
This theorem is referenced by: (None) |
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