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| Mirrors > Home > ILE Home > Th. List > hashfz | GIF version | ||
| Description: Value of the numeric cardinality of a nonempty integer range. (Contributed by Stefan O'Rear, 12-Sep-2014.) (Proof shortened by Mario Carneiro, 15-Apr-2015.) |
| Ref | Expression |
|---|---|
| hashfz | ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘(𝐴...𝐵)) = ((𝐵 − 𝐴) + 1)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluzel2 9738 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐴 ∈ ℤ) | |
| 2 | eluzelz 9743 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℤ) | |
| 3 | 1z 9483 | . . . . . 6 ⊢ 1 ∈ ℤ | |
| 4 | zsubcl 9498 | . . . . . 6 ⊢ ((1 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (1 − 𝐴) ∈ ℤ) | |
| 5 | 3, 1, 4 | sylancr 414 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (1 − 𝐴) ∈ ℤ) |
| 6 | fzen 10251 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ (1 − 𝐴) ∈ ℤ) → (𝐴...𝐵) ≈ ((𝐴 + (1 − 𝐴))...(𝐵 + (1 − 𝐴)))) | |
| 7 | 1, 2, 5, 6 | syl3anc 1271 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐴...𝐵) ≈ ((𝐴 + (1 − 𝐴))...(𝐵 + (1 − 𝐴)))) |
| 8 | 1 | zcnd 9581 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐴 ∈ ℂ) |
| 9 | ax-1cn 8103 | . . . . . 6 ⊢ 1 ∈ ℂ | |
| 10 | pncan3 8365 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 + (1 − 𝐴)) = 1) | |
| 11 | 8, 9, 10 | sylancl 413 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐴 + (1 − 𝐴)) = 1) |
| 12 | 1cnd 8173 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 1 ∈ ℂ) | |
| 13 | 2 | zcnd 9581 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℂ) |
| 14 | 13, 8 | subcld 8468 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 − 𝐴) ∈ ℂ) |
| 15 | 13, 12, 8 | addsub12d 8491 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 + (1 − 𝐴)) = (1 + (𝐵 − 𝐴))) |
| 16 | 12, 14, 15 | comraddd 8314 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 + (1 − 𝐴)) = ((𝐵 − 𝐴) + 1)) |
| 17 | 11, 16 | oveq12d 6025 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((𝐴 + (1 − 𝐴))...(𝐵 + (1 − 𝐴))) = (1...((𝐵 − 𝐴) + 1))) |
| 18 | 7, 17 | breqtrd 4109 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐴...𝐵) ≈ (1...((𝐵 − 𝐴) + 1))) |
| 19 | 1, 2 | fzfigd 10665 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐴...𝐵) ∈ Fin) |
| 20 | 1zzd 9484 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 1 ∈ ℤ) | |
| 21 | 2, 1 | zsubcld 9585 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 − 𝐴) ∈ ℤ) |
| 22 | 21 | peano2zd 9583 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((𝐵 − 𝐴) + 1) ∈ ℤ) |
| 23 | 20, 22 | fzfigd 10665 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (1...((𝐵 − 𝐴) + 1)) ∈ Fin) |
| 24 | hashen 11018 | . . . 4 ⊢ (((𝐴...𝐵) ∈ Fin ∧ (1...((𝐵 − 𝐴) + 1)) ∈ Fin) → ((♯‘(𝐴...𝐵)) = (♯‘(1...((𝐵 − 𝐴) + 1))) ↔ (𝐴...𝐵) ≈ (1...((𝐵 − 𝐴) + 1)))) | |
| 25 | 19, 23, 24 | syl2anc 411 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((♯‘(𝐴...𝐵)) = (♯‘(1...((𝐵 − 𝐴) + 1))) ↔ (𝐴...𝐵) ≈ (1...((𝐵 − 𝐴) + 1)))) |
| 26 | 18, 25 | mpbird 167 | . 2 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘(𝐴...𝐵)) = (♯‘(1...((𝐵 − 𝐴) + 1)))) |
| 27 | uznn0sub 9766 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 − 𝐴) ∈ ℕ0) | |
| 28 | peano2nn0 9420 | . . 3 ⊢ ((𝐵 − 𝐴) ∈ ℕ0 → ((𝐵 − 𝐴) + 1) ∈ ℕ0) | |
| 29 | hashfz1 11017 | . . 3 ⊢ (((𝐵 − 𝐴) + 1) ∈ ℕ0 → (♯‘(1...((𝐵 − 𝐴) + 1))) = ((𝐵 − 𝐴) + 1)) | |
| 30 | 27, 28, 29 | 3syl 17 | . 2 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘(1...((𝐵 − 𝐴) + 1))) = ((𝐵 − 𝐴) + 1)) |
| 31 | 26, 30 | eqtrd 2262 | 1 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘(𝐴...𝐵)) = ((𝐵 − 𝐴) + 1)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1395 ∈ wcel 2200 class class class wbr 4083 ‘cfv 5318 (class class class)co 6007 ≈ cen 6893 Fincfn 6895 ℂcc 8008 1c1 8011 + caddc 8013 − cmin 8328 ℕ0cn0 9380 ℤcz 9457 ℤ≥cuz 9733 ...cfz 10216 ♯chash 11009 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4199 ax-sep 4202 ax-nul 4210 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-iinf 4680 ax-cnex 8101 ax-resscn 8102 ax-1cn 8103 ax-1re 8104 ax-icn 8105 ax-addcl 8106 ax-addrcl 8107 ax-mulcl 8108 ax-addcom 8110 ax-addass 8112 ax-distr 8114 ax-i2m1 8115 ax-0lt1 8116 ax-0id 8118 ax-rnegex 8119 ax-cnre 8121 ax-pre-ltirr 8122 ax-pre-ltwlin 8123 ax-pre-lttrn 8124 ax-pre-apti 8125 ax-pre-ltadd 8126 |
| This theorem depends on definitions: df-bi 117 df-dc 840 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-iun 3967 df-br 4084 df-opab 4146 df-mpt 4147 df-tr 4183 df-id 4384 df-iord 4457 df-on 4459 df-ilim 4460 df-suc 4462 df-iom 4683 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-res 4731 df-ima 4732 df-iota 5278 df-fun 5320 df-fn 5321 df-f 5322 df-f1 5323 df-fo 5324 df-f1o 5325 df-fv 5326 df-riota 5960 df-ov 6010 df-oprab 6011 df-mpo 6012 df-1st 6292 df-2nd 6293 df-recs 6457 df-frec 6543 df-1o 6568 df-er 6688 df-en 6896 df-dom 6897 df-fin 6898 df-pnf 8194 df-mnf 8195 df-xr 8196 df-ltxr 8197 df-le 8198 df-sub 8330 df-neg 8331 df-inn 9122 df-n0 9381 df-z 9458 df-uz 9734 df-fz 10217 df-ihash 11010 |
| This theorem is referenced by: hashfzo 11057 hashfzp1 11059 hashfz0 11060 0sgmppw 15682 gausslemma2dlem5 15760 |
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