| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > fzind2 | GIF version | ||
| Description: Induction on the integers from 𝑀 to 𝑁 inclusive. The first four hypotheses give us the substitution instances we need; the last two are the basis and the induction step. Version of fzind 9573 using integer range definitions. (Contributed by Mario Carneiro, 6-Feb-2016.) |
| Ref | Expression |
|---|---|
| fzind2.1 | ⊢ (𝑥 = 𝑀 → (𝜑 ↔ 𝜓)) |
| fzind2.2 | ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜒)) |
| fzind2.3 | ⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜃)) |
| fzind2.4 | ⊢ (𝑥 = 𝐾 → (𝜑 ↔ 𝜏)) |
| fzind2.5 | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝜓) |
| fzind2.6 | ⊢ (𝑦 ∈ (𝑀..^𝑁) → (𝜒 → 𝜃)) |
| Ref | Expression |
|---|---|
| fzind2 | ⊢ (𝐾 ∈ (𝑀...𝑁) → 𝜏) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elfz2 10223 | . . 3 ⊢ (𝐾 ∈ (𝑀...𝑁) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) | |
| 2 | anass 401 | . . . 4 ⊢ ((((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝐾 ∈ ℤ) ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)))) | |
| 3 | df-3an 1004 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝐾 ∈ ℤ)) | |
| 4 | 3 | anbi1i 458 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)) ↔ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝐾 ∈ ℤ) ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
| 5 | 3anass 1006 | . . . . 5 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁) ↔ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) | |
| 6 | 5 | anbi2i 457 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)))) |
| 7 | 2, 4, 6 | 3bitr4i 212 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
| 8 | 1, 7 | bitri 184 | . 2 ⊢ (𝐾 ∈ (𝑀...𝑁) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁))) |
| 9 | fzind2.1 | . . 3 ⊢ (𝑥 = 𝑀 → (𝜑 ↔ 𝜓)) | |
| 10 | fzind2.2 | . . 3 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜒)) | |
| 11 | fzind2.3 | . . 3 ⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜃)) | |
| 12 | fzind2.4 | . . 3 ⊢ (𝑥 = 𝐾 → (𝜑 ↔ 𝜏)) | |
| 13 | eluz2 9739 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) ↔ (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁)) | |
| 14 | fzind2.5 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝜓) | |
| 15 | 13, 14 | sylbir 135 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁) → 𝜓) |
| 16 | 3anass 1006 | . . . 4 ⊢ ((𝑦 ∈ ℤ ∧ 𝑀 ≤ 𝑦 ∧ 𝑦 < 𝑁) ↔ (𝑦 ∈ ℤ ∧ (𝑀 ≤ 𝑦 ∧ 𝑦 < 𝑁))) | |
| 17 | elfzo 10357 | . . . . . . . 8 ⊢ ((𝑦 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑦 ∈ (𝑀..^𝑁) ↔ (𝑀 ≤ 𝑦 ∧ 𝑦 < 𝑁))) | |
| 18 | fzind2.6 | . . . . . . . 8 ⊢ (𝑦 ∈ (𝑀..^𝑁) → (𝜒 → 𝜃)) | |
| 19 | 17, 18 | biimtrrdi 164 | . . . . . . 7 ⊢ ((𝑦 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝑀 ≤ 𝑦 ∧ 𝑦 < 𝑁) → (𝜒 → 𝜃))) |
| 20 | 19 | 3coml 1234 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑦 ∈ ℤ) → ((𝑀 ≤ 𝑦 ∧ 𝑦 < 𝑁) → (𝜒 → 𝜃))) |
| 21 | 20 | 3expa 1227 | . . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑦 ∈ ℤ) → ((𝑀 ≤ 𝑦 ∧ 𝑦 < 𝑁) → (𝜒 → 𝜃))) |
| 22 | 21 | impr 379 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝑦 ∈ ℤ ∧ (𝑀 ≤ 𝑦 ∧ 𝑦 < 𝑁))) → (𝜒 → 𝜃)) |
| 23 | 16, 22 | sylan2b 287 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝑦 ∈ ℤ ∧ 𝑀 ≤ 𝑦 ∧ 𝑦 < 𝑁)) → (𝜒 → 𝜃)) |
| 24 | 9, 10, 11, 12, 15, 23 | fzind 9573 | . 2 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ 𝑀 ≤ 𝐾 ∧ 𝐾 ≤ 𝑁)) → 𝜏) |
| 25 | 8, 24 | sylbi 121 | 1 ⊢ (𝐾 ∈ (𝑀...𝑁) → 𝜏) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 1002 = wceq 1395 ∈ wcel 2200 class class class wbr 4083 ‘cfv 5318 (class class class)co 6007 1c1 8011 + caddc 8013 < clt 8192 ≤ cle 8193 ℤcz 9457 ℤ≥cuz 9733 ...cfz 10216 ..^cfzo 10350 |
| 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-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 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-ltadd 8126 |
| This theorem depends on definitions: df-bi 117 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-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-id 4384 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-fv 5326 df-riota 5960 df-ov 6010 df-oprab 6011 df-mpo 6012 df-1st 6292 df-2nd 6293 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-fzo 10351 |
| This theorem is referenced by: exfzdc 10458 seq3clss 10705 seq3caopr3 10725 seqcaopr3g 10726 seq3f1olemp 10749 seqf1oglem2a 10752 seq3id3 10758 seqfeq4g 10765 ser3ge0 10770 prodfap0 12071 prodfrecap 12072 eulerthlemrprm 12766 eulerthlema 12767 nninfdclemlt 13037 gsumfzz 13543 gsumfzfsumlemm 14566 |
| Copyright terms: Public domain | W3C validator |