| 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 13532. (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 12803 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
| 2 | 1 | zcnd 12639 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℂ) |
| 3 | 1zzd 12564 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 1 ∈ ℤ) | |
| 4 | 3 | zcnd 12639 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 1 ∈ ℂ) |
| 5 | 2, 4 | npcand 11537 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑁 − 1) + 1) = 𝑁) |
| 6 | 5 | eleq1d 2813 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (((𝑁 − 1) + 1) ∈ (ℤ≥‘𝑀) ↔ 𝑁 ∈ (ℤ≥‘𝑀))) |
| 7 | 6 | ibir 268 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑁 − 1) + 1) ∈ (ℤ≥‘𝑀)) |
| 8 | eluzelre 12804 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℝ) | |
| 9 | 8 | lem1d 12116 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 1) ≤ 𝑁) |
| 10 | 1, 3 | zsubcld 12643 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 1) ∈ ℤ) |
| 11 | eluz1 12797 | . . . . 5 ⊢ ((𝑁 − 1) ∈ ℤ → (𝑁 ∈ (ℤ≥‘(𝑁 − 1)) ↔ (𝑁 ∈ ℤ ∧ (𝑁 − 1) ≤ 𝑁))) | |
| 12 | 10, 11 | syl 17 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 ∈ (ℤ≥‘(𝑁 − 1)) ↔ (𝑁 ∈ ℤ ∧ (𝑁 − 1) ≤ 𝑁))) |
| 13 | 1, 9, 12 | mpbir2and 713 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ (ℤ≥‘(𝑁 − 1))) |
| 14 | fzsplit2 13510 | . . 3 ⊢ ((((𝑁 − 1) + 1) ∈ (ℤ≥‘𝑀) ∧ 𝑁 ∈ (ℤ≥‘(𝑁 − 1))) → (𝑀...𝑁) = ((𝑀...(𝑁 − 1)) ∪ (((𝑁 − 1) + 1)...𝑁))) | |
| 15 | 7, 13, 14 | syl2anc 584 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀...𝑁) = ((𝑀...(𝑁 − 1)) ∪ (((𝑁 − 1) + 1)...𝑁))) |
| 16 | 5 | oveq1d 7402 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (((𝑁 − 1) + 1)...𝑁) = (𝑁...𝑁)) |
| 17 | fzsn 13527 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (𝑁...𝑁) = {𝑁}) | |
| 18 | 1, 17 | syl 17 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁...𝑁) = {𝑁}) |
| 19 | 16, 18 | eqtrd 2764 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (((𝑁 − 1) + 1)...𝑁) = {𝑁}) |
| 20 | 19 | uneq2d 4131 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀...(𝑁 − 1)) ∪ (((𝑁 − 1) + 1)...𝑁)) = ((𝑀...(𝑁 − 1)) ∪ {𝑁})) |
| 21 | 15, 20 | eqtrd 2764 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀...𝑁) = ((𝑀...(𝑁 − 1)) ∪ {𝑁})) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∪ cun 3912 {csn 4589 class class class wbr 5107 ‘cfv 6511 (class class class)co 7387 1c1 11069 + caddc 11071 ≤ cle 11209 − cmin 11405 ℤcz 12529 ℤ≥cuz 12793 ...cfz 13468 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-om 7843 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-nn 12187 df-n0 12443 df-z 12530 df-uz 12794 df-fz 13469 |
| This theorem is referenced by: fzdif2 32713 ballotlemfp1 34483 |
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