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Mirrors > Home > MPE Home > Th. List > fzostep1 | Structured version Visualization version GIF version |
Description: Two possibilities for a number one greater than a number in a half-open range. (Contributed by Stefan O'Rear, 23-Aug-2015.) |
Ref | Expression |
---|---|
fzostep1 | ⊢ (𝐴 ∈ (𝐵..^𝐶) → ((𝐴 + 1) ∈ (𝐵..^𝐶) ∨ (𝐴 + 1) = 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elfzoel1 13024 | . . . 4 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐵 ∈ ℤ) | |
2 | uzid 12246 | . . . 4 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ (ℤ≥‘𝐵)) | |
3 | peano2uz 12289 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐵) → (𝐵 + 1) ∈ (ℤ≥‘𝐵)) | |
4 | fzoss1 13052 | . . . 4 ⊢ ((𝐵 + 1) ∈ (ℤ≥‘𝐵) → ((𝐵 + 1)..^(𝐶 + 1)) ⊆ (𝐵..^(𝐶 + 1))) | |
5 | 1, 2, 3, 4 | 4syl 19 | . . 3 ⊢ (𝐴 ∈ (𝐵..^𝐶) → ((𝐵 + 1)..^(𝐶 + 1)) ⊆ (𝐵..^(𝐶 + 1))) |
6 | 1z 12000 | . . . 4 ⊢ 1 ∈ ℤ | |
7 | fzoaddel 13078 | . . . 4 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 1 ∈ ℤ) → (𝐴 + 1) ∈ ((𝐵 + 1)..^(𝐶 + 1))) | |
8 | 6, 7 | mpan2 687 | . . 3 ⊢ (𝐴 ∈ (𝐵..^𝐶) → (𝐴 + 1) ∈ ((𝐵 + 1)..^(𝐶 + 1))) |
9 | 5, 8 | sseldd 3965 | . 2 ⊢ (𝐴 ∈ (𝐵..^𝐶) → (𝐴 + 1) ∈ (𝐵..^(𝐶 + 1))) |
10 | elfzoel2 13025 | . . . 4 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐶 ∈ ℤ) | |
11 | elfzolt3 13036 | . . . . 5 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐵 < 𝐶) | |
12 | zre 11973 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℝ) | |
13 | zre 11973 | . . . . . . 7 ⊢ (𝐶 ∈ ℤ → 𝐶 ∈ ℝ) | |
14 | ltle 10717 | . . . . . . 7 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐵 < 𝐶 → 𝐵 ≤ 𝐶)) | |
15 | 12, 13, 14 | syl2an 595 | . . . . . 6 ⊢ ((𝐵 ∈ ℤ ∧ 𝐶 ∈ ℤ) → (𝐵 < 𝐶 → 𝐵 ≤ 𝐶)) |
16 | 1, 10, 15 | syl2anc 584 | . . . . 5 ⊢ (𝐴 ∈ (𝐵..^𝐶) → (𝐵 < 𝐶 → 𝐵 ≤ 𝐶)) |
17 | 11, 16 | mpd 15 | . . . 4 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐵 ≤ 𝐶) |
18 | eluz2 12237 | . . . 4 ⊢ (𝐶 ∈ (ℤ≥‘𝐵) ↔ (𝐵 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐵 ≤ 𝐶)) | |
19 | 1, 10, 17, 18 | syl3anbrc 1335 | . . 3 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐶 ∈ (ℤ≥‘𝐵)) |
20 | fzosplitsni 13136 | . . 3 ⊢ (𝐶 ∈ (ℤ≥‘𝐵) → ((𝐴 + 1) ∈ (𝐵..^(𝐶 + 1)) ↔ ((𝐴 + 1) ∈ (𝐵..^𝐶) ∨ (𝐴 + 1) = 𝐶))) | |
21 | 19, 20 | syl 17 | . 2 ⊢ (𝐴 ∈ (𝐵..^𝐶) → ((𝐴 + 1) ∈ (𝐵..^(𝐶 + 1)) ↔ ((𝐴 + 1) ∈ (𝐵..^𝐶) ∨ (𝐴 + 1) = 𝐶))) |
22 | 9, 21 | mpbid 233 | 1 ⊢ (𝐴 ∈ (𝐵..^𝐶) → ((𝐴 + 1) ∈ (𝐵..^𝐶) ∨ (𝐴 + 1) = 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 207 ∨ wo 841 = wceq 1528 ∈ wcel 2105 ⊆ wss 3933 class class class wbr 5057 ‘cfv 6348 (class class class)co 7145 ℝcr 10524 1c1 10526 + caddc 10528 < clt 10663 ≤ cle 10664 ℤcz 11969 ℤ≥cuz 12231 ..^cfzo 13021 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 ax-cnex 10581 ax-resscn 10582 ax-1cn 10583 ax-icn 10584 ax-addcl 10585 ax-addrcl 10586 ax-mulcl 10587 ax-mulrcl 10588 ax-mulcom 10589 ax-addass 10590 ax-mulass 10591 ax-distr 10592 ax-i2m1 10593 ax-1ne0 10594 ax-1rid 10595 ax-rnegex 10596 ax-rrecex 10597 ax-cnre 10598 ax-pre-lttri 10599 ax-pre-lttrn 10600 ax-pre-ltadd 10601 ax-pre-mulgt0 10602 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-nel 3121 df-ral 3140 df-rex 3141 df-reu 3142 df-rab 3144 df-v 3494 df-sbc 3770 df-csb 3881 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-pss 3951 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4831 df-iun 4912 df-br 5058 df-opab 5120 df-mpt 5138 df-tr 5164 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-riota 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-om 7570 df-1st 7678 df-2nd 7679 df-wrecs 7936 df-recs 7997 df-rdg 8035 df-er 8278 df-en 8498 df-dom 8499 df-sdom 8500 df-pnf 10665 df-mnf 10666 df-xr 10667 df-ltxr 10668 df-le 10669 df-sub 10860 df-neg 10861 df-nn 11627 df-n0 11886 df-z 11970 df-uz 12232 df-fz 12881 df-fzo 13022 |
This theorem is referenced by: psgnunilem5 18551 |
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