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Mirrors > Home > MPE Home > Th. List > fzosplitprm1 | Structured version Visualization version GIF version |
Description: Extending a half-open integer range by an unordered pair at the end. (Contributed by Alexander van der Vekens, 22-Sep-2018.) (Proof shortened by AV, 25-Jun-2022.) |
Ref | Expression |
---|---|
fzosplitprm1 | ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐴..^(𝐵 + 1)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), 𝐵})) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 1135 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → 𝐴 ∈ ℤ) | |
2 | peano2zm 12363 | . . . . 5 ⊢ (𝐵 ∈ ℤ → (𝐵 − 1) ∈ ℤ) | |
3 | 2 | 3ad2ant2 1133 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐵 − 1) ∈ ℤ) |
4 | zltlem1 12373 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 < 𝐵 ↔ 𝐴 ≤ (𝐵 − 1))) | |
5 | 4 | biimp3a 1468 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → 𝐴 ≤ (𝐵 − 1)) |
6 | eluz2 12588 | . . . 4 ⊢ ((𝐵 − 1) ∈ (ℤ≥‘𝐴) ↔ (𝐴 ∈ ℤ ∧ (𝐵 − 1) ∈ ℤ ∧ 𝐴 ≤ (𝐵 − 1))) | |
7 | 1, 3, 5, 6 | syl3anbrc 1342 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐵 − 1) ∈ (ℤ≥‘𝐴)) |
8 | fzosplitpr 13496 | . . 3 ⊢ ((𝐵 − 1) ∈ (ℤ≥‘𝐴) → (𝐴..^((𝐵 − 1) + 2)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), ((𝐵 − 1) + 1)})) | |
9 | 7, 8 | syl 17 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐴..^((𝐵 − 1) + 2)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), ((𝐵 − 1) + 1)})) |
10 | zcn 12324 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℂ) | |
11 | 1cnd 10970 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → 1 ∈ ℂ) | |
12 | 2cnd 12051 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → 2 ∈ ℂ) | |
13 | 10, 11, 12 | subadd23d 11354 | . . . . . 6 ⊢ (𝐵 ∈ ℤ → ((𝐵 − 1) + 2) = (𝐵 + (2 − 1))) |
14 | 2m1e1 12099 | . . . . . . 7 ⊢ (2 − 1) = 1 | |
15 | 14 | oveq2i 7286 | . . . . . 6 ⊢ (𝐵 + (2 − 1)) = (𝐵 + 1) |
16 | 13, 15 | eqtr2di 2795 | . . . . 5 ⊢ (𝐵 ∈ ℤ → (𝐵 + 1) = ((𝐵 − 1) + 2)) |
17 | 16 | oveq2d 7291 | . . . 4 ⊢ (𝐵 ∈ ℤ → (𝐴..^(𝐵 + 1)) = (𝐴..^((𝐵 − 1) + 2))) |
18 | npcan1 11400 | . . . . . . . 8 ⊢ (𝐵 ∈ ℂ → ((𝐵 − 1) + 1) = 𝐵) | |
19 | 10, 18 | syl 17 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → ((𝐵 − 1) + 1) = 𝐵) |
20 | 19 | eqcomd 2744 | . . . . . 6 ⊢ (𝐵 ∈ ℤ → 𝐵 = ((𝐵 − 1) + 1)) |
21 | 20 | preq2d 4676 | . . . . 5 ⊢ (𝐵 ∈ ℤ → {(𝐵 − 1), 𝐵} = {(𝐵 − 1), ((𝐵 − 1) + 1)}) |
22 | 21 | uneq2d 4097 | . . . 4 ⊢ (𝐵 ∈ ℤ → ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), 𝐵}) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), ((𝐵 − 1) + 1)})) |
23 | 17, 22 | eqeq12d 2754 | . . 3 ⊢ (𝐵 ∈ ℤ → ((𝐴..^(𝐵 + 1)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), 𝐵}) ↔ (𝐴..^((𝐵 − 1) + 2)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), ((𝐵 − 1) + 1)}))) |
24 | 23 | 3ad2ant2 1133 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → ((𝐴..^(𝐵 + 1)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), 𝐵}) ↔ (𝐴..^((𝐵 − 1) + 2)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), ((𝐵 − 1) + 1)}))) |
25 | 9, 24 | mpbird 256 | 1 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐴..^(𝐵 + 1)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), 𝐵})) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ∪ cun 3885 {cpr 4563 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 1c1 10872 + caddc 10874 < clt 11009 ≤ cle 11010 − cmin 11205 2c2 12028 ℤcz 12319 ℤ≥cuz 12582 ..^cfzo 13382 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 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 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-nn 11974 df-2 12036 df-n0 12234 df-z 12320 df-uz 12583 df-fz 13240 df-fzo 13383 |
This theorem is referenced by: (None) |
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