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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 9673 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐴 ∈ ℤ) | |
| 2 | eluzelz 9677 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℤ) | |
| 3 | 1z 9418 | . . . . . 6 ⊢ 1 ∈ ℤ | |
| 4 | zsubcl 9433 | . . . . . 6 ⊢ ((1 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (1 − 𝐴) ∈ ℤ) | |
| 5 | 3, 1, 4 | sylancr 414 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (1 − 𝐴) ∈ ℤ) |
| 6 | fzen 10185 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ (1 − 𝐴) ∈ ℤ) → (𝐴...𝐵) ≈ ((𝐴 + (1 − 𝐴))...(𝐵 + (1 − 𝐴)))) | |
| 7 | 1, 2, 5, 6 | syl3anc 1250 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐴...𝐵) ≈ ((𝐴 + (1 − 𝐴))...(𝐵 + (1 − 𝐴)))) |
| 8 | 1 | zcnd 9516 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐴 ∈ ℂ) |
| 9 | ax-1cn 8038 | . . . . . 6 ⊢ 1 ∈ ℂ | |
| 10 | pncan3 8300 | . . . . . 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 8108 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 1 ∈ ℂ) | |
| 13 | 2 | zcnd 9516 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 𝐵 ∈ ℂ) |
| 14 | 13, 8 | subcld 8403 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 − 𝐴) ∈ ℂ) |
| 15 | 13, 12, 8 | addsub12d 8426 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 + (1 − 𝐴)) = (1 + (𝐵 − 𝐴))) |
| 16 | 12, 14, 15 | comraddd 8249 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 + (1 − 𝐴)) = ((𝐵 − 𝐴) + 1)) |
| 17 | 11, 16 | oveq12d 5975 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((𝐴 + (1 − 𝐴))...(𝐵 + (1 − 𝐴))) = (1...((𝐵 − 𝐴) + 1))) |
| 18 | 7, 17 | breqtrd 4077 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐴...𝐵) ≈ (1...((𝐵 − 𝐴) + 1))) |
| 19 | 1, 2 | fzfigd 10598 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐴...𝐵) ∈ Fin) |
| 20 | 1zzd 9419 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → 1 ∈ ℤ) | |
| 21 | 2, 1 | zsubcld 9520 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 − 𝐴) ∈ ℤ) |
| 22 | 21 | peano2zd 9518 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → ((𝐵 − 𝐴) + 1) ∈ ℤ) |
| 23 | 20, 22 | fzfigd 10598 | . . . 4 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (1...((𝐵 − 𝐴) + 1)) ∈ Fin) |
| 24 | hashen 10951 | . . . 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 9700 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (𝐵 − 𝐴) ∈ ℕ0) | |
| 28 | peano2nn0 9355 | . . 3 ⊢ ((𝐵 − 𝐴) ∈ ℕ0 → ((𝐵 − 𝐴) + 1) ∈ ℕ0) | |
| 29 | hashfz1 10950 | . . 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 2239 | 1 ⊢ (𝐵 ∈ (ℤ≥‘𝐴) → (♯‘(𝐴...𝐵)) = ((𝐵 − 𝐴) + 1)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1373 ∈ wcel 2177 class class class wbr 4051 ‘cfv 5280 (class class class)co 5957 ≈ cen 6838 Fincfn 6840 ℂcc 7943 1c1 7946 + caddc 7948 − cmin 8263 ℕ0cn0 9315 ℤcz 9392 ℤ≥cuz 9668 ...cfz 10150 ♯chash 10942 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-coll 4167 ax-sep 4170 ax-nul 4178 ax-pow 4226 ax-pr 4261 ax-un 4488 ax-setind 4593 ax-iinf 4644 ax-cnex 8036 ax-resscn 8037 ax-1cn 8038 ax-1re 8039 ax-icn 8040 ax-addcl 8041 ax-addrcl 8042 ax-mulcl 8043 ax-addcom 8045 ax-addass 8047 ax-distr 8049 ax-i2m1 8050 ax-0lt1 8051 ax-0id 8053 ax-rnegex 8054 ax-cnre 8056 ax-pre-ltirr 8057 ax-pre-ltwlin 8058 ax-pre-lttrn 8059 ax-pre-apti 8060 ax-pre-ltadd 8061 |
| This theorem depends on definitions: df-bi 117 df-dc 837 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-nel 2473 df-ral 2490 df-rex 2491 df-reu 2492 df-rab 2494 df-v 2775 df-sbc 3003 df-csb 3098 df-dif 3172 df-un 3174 df-in 3176 df-ss 3183 df-nul 3465 df-pw 3623 df-sn 3644 df-pr 3645 df-op 3647 df-uni 3857 df-int 3892 df-iun 3935 df-br 4052 df-opab 4114 df-mpt 4115 df-tr 4151 df-id 4348 df-iord 4421 df-on 4423 df-ilim 4424 df-suc 4426 df-iom 4647 df-xp 4689 df-rel 4690 df-cnv 4691 df-co 4692 df-dm 4693 df-rn 4694 df-res 4695 df-ima 4696 df-iota 5241 df-fun 5282 df-fn 5283 df-f 5284 df-f1 5285 df-fo 5286 df-f1o 5287 df-fv 5288 df-riota 5912 df-ov 5960 df-oprab 5961 df-mpo 5962 df-1st 6239 df-2nd 6240 df-recs 6404 df-frec 6490 df-1o 6515 df-er 6633 df-en 6841 df-dom 6842 df-fin 6843 df-pnf 8129 df-mnf 8130 df-xr 8131 df-ltxr 8132 df-le 8133 df-sub 8265 df-neg 8266 df-inn 9057 df-n0 9316 df-z 9393 df-uz 9669 df-fz 10151 df-ihash 10943 |
| This theorem is referenced by: hashfzo 10989 hashfzp1 10991 hashfz0 10992 0sgmppw 15540 gausslemma2dlem5 15618 |
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