| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fzspl | Structured version Visualization version GIF version | ||
| Description: Split the last element of a finite set of sequential integers. More generic than fzsuc 13595. (Contributed by Thierry Arnoux, 7-Nov-2016.) |
| Ref | Expression |
|---|---|
| fzspl | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀...𝑁) = ((𝑀...(𝑁 − 1)) ∪ {𝑁})) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluzelz 12868 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
| 2 | 1 | zcnd 12697 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℂ) |
| 3 | 1zzd 12621 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 1 ∈ ℤ) | |
| 4 | 3 | zcnd 12697 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 1 ∈ ℂ) |
| 5 | 2, 4 | npcand 11569 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑁 − 1) + 1) = 𝑁) |
| 6 | 5 | eleq1d 2854 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (((𝑁 − 1) + 1) ∈ (ℤ≥‘𝑀) ↔ 𝑁 ∈ (ℤ≥‘𝑀))) |
| 7 | 6 | ibir 271 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑁 − 1) + 1) ∈ (ℤ≥‘𝑀)) |
| 8 | eluzelre 12869 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℝ) | |
| 9 | 8 | lem1d 12144 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 1) ≤ 𝑁) |
| 10 | 1, 3 | zsubcld 12701 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 1) ∈ ℤ) |
| 11 | eluz1 12862 | . . . . 5 ⊢ ((𝑁 − 1) ∈ ℤ → (𝑁 ∈ (ℤ≥‘(𝑁 − 1)) ↔ (𝑁 ∈ ℤ ∧ (𝑁 − 1) ≤ 𝑁))) | |
| 12 | 10, 11 | syl 18 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 ∈ (ℤ≥‘(𝑁 − 1)) ↔ (𝑁 ∈ ℤ ∧ (𝑁 − 1) ≤ 𝑁))) |
| 13 | 1, 9, 12 | mpbir2and 725 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ (ℤ≥‘(𝑁 − 1))) |
| 14 | fzsplit2 13573 | . . 3 ⊢ ((((𝑁 − 1) + 1) ∈ (ℤ≥‘𝑀) ∧ 𝑁 ∈ (ℤ≥‘(𝑁 − 1))) → (𝑀...𝑁) = ((𝑀...(𝑁 − 1)) ∪ (((𝑁 − 1) + 1)...𝑁))) | |
| 15 | 7, 13, 14 | syl2anc 595 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀...𝑁) = ((𝑀...(𝑁 − 1)) ∪ (((𝑁 − 1) + 1)...𝑁))) |
| 16 | 5 | oveq1d 7423 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (((𝑁 − 1) + 1)...𝑁) = (𝑁...𝑁)) |
| 17 | fzsn 13590 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (𝑁...𝑁) = {𝑁}) | |
| 18 | 1, 17 | syl 18 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁...𝑁) = {𝑁}) |
| 19 | 16, 18 | eqtrd 2804 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (((𝑁 − 1) + 1)...𝑁) = {𝑁}) |
| 20 | 19 | uneq2d 4130 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀...(𝑁 − 1)) ∪ (((𝑁 − 1) + 1)...𝑁)) = ((𝑀...(𝑁 − 1)) ∪ {𝑁})) |
| 21 | 15, 20 | eqtrd 2804 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀...𝑁) = ((𝑀...(𝑁 − 1)) ∪ {𝑁})) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ∪ cun 3911 {csn 4591 class class class wbr 5110 ‘cfv 6534 (class class class)co 7408 1c1 11097 + caddc 11099 ≤ cle 11240 − cmin 11437 ℤcz 12587 ℤ≥cuz 12858 ...cfz 13531 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-cnex 11152 ax-resscn 11153 ax-1cn 11154 ax-icn 11155 ax-addcl 11156 ax-addrcl 11157 ax-mulcl 11158 ax-mulrcl 11159 ax-mulcom 11160 ax-addass 11161 ax-mulass 11162 ax-distr 11163 ax-i2m1 11164 ax-1ne0 11165 ax-1rid 11166 ax-rnegex 11167 ax-rrecex 11168 ax-cnre 11169 ax-pre-lttri 11170 ax-pre-lttrn 11171 ax-pre-ltadd 11172 ax-pre-mulgt0 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6300 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6490 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11241 df-mnf 11242 df-xr 11243 df-ltxr 11244 df-le 11245 df-sub 11439 df-neg 11440 df-nn 12230 df-n0 12501 df-z 12588 df-uz 12859 df-fz 13532 |
| This theorem is referenced by: fzdif2 33072 ballotlemfp1 34823 |
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