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Mirrors > Home > ILE Home > Th. List > fzospliti | GIF version |
Description: One direction of splitting a half-open integer range in half. (Contributed by Stefan O'Rear, 14-Aug-2015.) |
Ref | Expression |
---|---|
fzospliti | ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐴 ∈ (𝐵..^𝐷) ∨ 𝐴 ∈ (𝐷..^𝐶))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 109 | . . . . 5 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → 𝐷 ∈ ℤ) | |
2 | elfzoelz 9612 | . . . . . 6 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐴 ∈ ℤ) | |
3 | 2 | adantr 271 | . . . . 5 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → 𝐴 ∈ ℤ) |
4 | zlelttric 8849 | . . . . 5 ⊢ ((𝐷 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (𝐷 ≤ 𝐴 ∨ 𝐴 < 𝐷)) | |
5 | 1, 3, 4 | syl2anc 404 | . . . 4 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐷 ≤ 𝐴 ∨ 𝐴 < 𝐷)) |
6 | 5 | orcomd 684 | . . 3 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐴 < 𝐷 ∨ 𝐷 ≤ 𝐴)) |
7 | elfzole1 9620 | . . . . . . 7 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐵 ≤ 𝐴) | |
8 | 7 | adantr 271 | . . . . . 6 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → 𝐵 ≤ 𝐴) |
9 | 8 | a1d 22 | . . . . 5 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐴 < 𝐷 → 𝐵 ≤ 𝐴)) |
10 | 9 | ancrd 320 | . . . 4 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐴 < 𝐷 → (𝐵 ≤ 𝐴 ∧ 𝐴 < 𝐷))) |
11 | elfzolt2 9621 | . . . . . . 7 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐴 < 𝐶) | |
12 | 11 | adantr 271 | . . . . . 6 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → 𝐴 < 𝐶) |
13 | 12 | a1d 22 | . . . . 5 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐷 ≤ 𝐴 → 𝐴 < 𝐶)) |
14 | 13 | ancld 319 | . . . 4 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐷 ≤ 𝐴 → (𝐷 ≤ 𝐴 ∧ 𝐴 < 𝐶))) |
15 | 10, 14 | orim12d 736 | . . 3 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → ((𝐴 < 𝐷 ∨ 𝐷 ≤ 𝐴) → ((𝐵 ≤ 𝐴 ∧ 𝐴 < 𝐷) ∨ (𝐷 ≤ 𝐴 ∧ 𝐴 < 𝐶)))) |
16 | 6, 15 | mpd 13 | . 2 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → ((𝐵 ≤ 𝐴 ∧ 𝐴 < 𝐷) ∨ (𝐷 ≤ 𝐴 ∧ 𝐴 < 𝐶))) |
17 | elfzoel1 9610 | . . . . 5 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐵 ∈ ℤ) | |
18 | 17 | adantr 271 | . . . 4 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → 𝐵 ∈ ℤ) |
19 | elfzo 9614 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐷 ∈ ℤ) → (𝐴 ∈ (𝐵..^𝐷) ↔ (𝐵 ≤ 𝐴 ∧ 𝐴 < 𝐷))) | |
20 | 3, 18, 1, 19 | syl3anc 1175 | . . 3 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐴 ∈ (𝐵..^𝐷) ↔ (𝐵 ≤ 𝐴 ∧ 𝐴 < 𝐷))) |
21 | elfzoel2 9611 | . . . . 5 ⊢ (𝐴 ∈ (𝐵..^𝐶) → 𝐶 ∈ ℤ) | |
22 | 21 | adantr 271 | . . . 4 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → 𝐶 ∈ ℤ) |
23 | elfzo 9614 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐷 ∈ ℤ ∧ 𝐶 ∈ ℤ) → (𝐴 ∈ (𝐷..^𝐶) ↔ (𝐷 ≤ 𝐴 ∧ 𝐴 < 𝐶))) | |
24 | 3, 1, 22, 23 | syl3anc 1175 | . . 3 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐴 ∈ (𝐷..^𝐶) ↔ (𝐷 ≤ 𝐴 ∧ 𝐴 < 𝐶))) |
25 | 20, 24 | orbi12d 743 | . 2 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → ((𝐴 ∈ (𝐵..^𝐷) ∨ 𝐴 ∈ (𝐷..^𝐶)) ↔ ((𝐵 ≤ 𝐴 ∧ 𝐴 < 𝐷) ∨ (𝐷 ≤ 𝐴 ∧ 𝐴 < 𝐶)))) |
26 | 16, 25 | mpbird 166 | 1 ⊢ ((𝐴 ∈ (𝐵..^𝐶) ∧ 𝐷 ∈ ℤ) → (𝐴 ∈ (𝐵..^𝐷) ∨ 𝐴 ∈ (𝐷..^𝐶))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∨ wo 665 ∈ wcel 1439 class class class wbr 3851 (class class class)co 5666 < clt 7576 ≤ cle 7577 ℤcz 8804 ..^cfzo 9607 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 580 ax-in2 581 ax-io 666 ax-5 1382 ax-7 1383 ax-gen 1384 ax-ie1 1428 ax-ie2 1429 ax-8 1441 ax-10 1442 ax-11 1443 ax-i12 1444 ax-bndl 1445 ax-4 1446 ax-13 1450 ax-14 1451 ax-17 1465 ax-i9 1469 ax-ial 1473 ax-i5r 1474 ax-ext 2071 ax-sep 3963 ax-pow 4015 ax-pr 4045 ax-un 4269 ax-setind 4366 ax-cnex 7490 ax-resscn 7491 ax-1cn 7492 ax-1re 7493 ax-icn 7494 ax-addcl 7495 ax-addrcl 7496 ax-mulcl 7497 ax-addcom 7499 ax-addass 7501 ax-distr 7503 ax-i2m1 7504 ax-0lt1 7505 ax-0id 7507 ax-rnegex 7508 ax-cnre 7510 ax-pre-ltirr 7511 ax-pre-ltwlin 7512 ax-pre-lttrn 7513 ax-pre-ltadd 7515 |
This theorem depends on definitions: df-bi 116 df-3or 926 df-3an 927 df-tru 1293 df-fal 1296 df-nf 1396 df-sb 1694 df-eu 1952 df-mo 1953 df-clab 2076 df-cleq 2082 df-clel 2085 df-nfc 2218 df-ne 2257 df-nel 2352 df-ral 2365 df-rex 2366 df-reu 2367 df-rab 2369 df-v 2622 df-sbc 2842 df-csb 2935 df-dif 3002 df-un 3004 df-in 3006 df-ss 3013 df-pw 3435 df-sn 3456 df-pr 3457 df-op 3459 df-uni 3660 df-int 3695 df-iun 3738 df-br 3852 df-opab 3906 df-mpt 3907 df-id 4129 df-xp 4457 df-rel 4458 df-cnv 4459 df-co 4460 df-dm 4461 df-rn 4462 df-res 4463 df-ima 4464 df-iota 4993 df-fun 5030 df-fn 5031 df-f 5032 df-fv 5036 df-riota 5622 df-ov 5669 df-oprab 5670 df-mpt2 5671 df-1st 5925 df-2nd 5926 df-pnf 7578 df-mnf 7579 df-xr 7580 df-ltxr 7581 df-le 7582 df-sub 7709 df-neg 7710 df-inn 8477 df-n0 8728 df-z 8805 df-uz 9074 df-fz 9479 df-fzo 9608 |
This theorem is referenced by: fzosplit 9642 fzocatel 9664 dfphi2 11528 |
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