| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 1154 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → 𝐴 ∈ ℤ) | |
| 2 | peano2zm 12655 | . . . . 5 ⊢ (𝐵 ∈ ℤ → (𝐵 − 1) ∈ ℤ) | |
| 3 | 2 | 3ad2ant2 1152 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐵 − 1) ∈ ℤ) |
| 4 | zltlem1 12665 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 < 𝐵 ↔ 𝐴 ≤ (𝐵 − 1))) | |
| 5 | 4 | biimp3a 1498 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → 𝐴 ≤ (𝐵 − 1)) |
| 6 | eluz2 12886 | . . . 4 ⊢ ((𝐵 − 1) ∈ (ℤ≥‘𝐴) ↔ (𝐴 ∈ ℤ ∧ (𝐵 − 1) ∈ ℤ ∧ 𝐴 ≤ (𝐵 − 1))) | |
| 7 | 1, 3, 5, 6 | syl3anbrc 1362 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐵 − 1) ∈ (ℤ≥‘𝐴)) |
| 8 | fzosplitpr 13825 | . . 3 ⊢ ((𝐵 − 1) ∈ (ℤ≥‘𝐴) → (𝐴..^((𝐵 − 1) + 2)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), ((𝐵 − 1) + 1)})) | |
| 9 | 7, 8 | syl 18 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐴..^((𝐵 − 1) + 2)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), ((𝐵 − 1) + 1)})) |
| 10 | zcn 12614 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℂ) | |
| 11 | 1cnd 11220 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → 1 ∈ ℂ) | |
| 12 | 2cnd 12337 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → 2 ∈ ℂ) | |
| 13 | 10, 11, 12 | subadd23d 11609 | . . . . . 6 ⊢ (𝐵 ∈ ℤ → ((𝐵 − 1) + 2) = (𝐵 + (2 − 1))) |
| 14 | 2m1e1 12383 | . . . . . . 7 ⊢ (2 − 1) = 1 | |
| 15 | 14 | oveq2i 7434 | . . . . . 6 ⊢ (𝐵 + (2 − 1)) = (𝐵 + 1) |
| 16 | 13, 15 | eqtr2di 2818 | . . . . 5 ⊢ (𝐵 ∈ ℤ → (𝐵 + 1) = ((𝐵 − 1) + 2)) |
| 17 | 16 | oveq2d 7439 | . . . 4 ⊢ (𝐵 ∈ ℤ → (𝐴..^(𝐵 + 1)) = (𝐴..^((𝐵 − 1) + 2))) |
| 18 | npcan1 11657 | . . . . . . . 8 ⊢ (𝐵 ∈ ℂ → ((𝐵 − 1) + 1) = 𝐵) | |
| 19 | 10, 18 | syl 18 | . . . . . . 7 ⊢ (𝐵 ∈ ℤ → ((𝐵 − 1) + 1) = 𝐵) |
| 20 | 19 | eqcomd 2772 | . . . . . 6 ⊢ (𝐵 ∈ ℤ → 𝐵 = ((𝐵 − 1) + 1)) |
| 21 | 20 | preq2d 4711 | . . . . 5 ⊢ (𝐵 ∈ ℤ → {(𝐵 − 1), 𝐵} = {(𝐵 − 1), ((𝐵 − 1) + 1)}) |
| 22 | 21 | uneq2d 4125 | . . . 4 ⊢ (𝐵 ∈ ℤ → ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), 𝐵}) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), ((𝐵 − 1) + 1)})) |
| 23 | 17, 22 | eqeq12d 2782 | . . 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 1152 | . 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 260 | 1 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐴 < 𝐵) → (𝐴..^(𝐵 + 1)) = ((𝐴..^(𝐵 − 1)) ∪ {(𝐵 − 1), 𝐵})) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ w3a 1103 = wceq 1570 ∈ wcel 2146 ∪ cun 3906 {cpr 4596 class class class wbr 5114 ‘cfv 6543 (class class class)co 7423 ℂcc 11116 1c1 11119 + caddc 11121 < clt 11261 ≤ cle 11262 − cmin 11459 2c2 12313 ℤcz 12609 ℤ≥cuz 12880 ..^cfzo 13701 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-cnex 11174 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-om 7872 df-1st 7995 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-nn 12252 df-2 12321 df-n0 12523 df-z 12610 df-uz 12881 df-fz 13554 df-fzo 13702 |
| This theorem is used by: (None) |
| Copyright terms: Public domain | W3C validator |