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Mirrors > Home > ILE Home > Th. List > uzind4 | GIF version |
Description: Induction on the upper set of integers that starts at an integer 𝑀. The first four hypotheses give us the substitution instances we need, and the last two are the basis and the induction step. (Contributed by NM, 7-Sep-2005.) |
Ref | Expression |
---|---|
uzind4.1 | ⊢ (𝑗 = 𝑀 → (𝜑 ↔ 𝜓)) |
uzind4.2 | ⊢ (𝑗 = 𝑘 → (𝜑 ↔ 𝜒)) |
uzind4.3 | ⊢ (𝑗 = (𝑘 + 1) → (𝜑 ↔ 𝜃)) |
uzind4.4 | ⊢ (𝑗 = 𝑁 → (𝜑 ↔ 𝜏)) |
uzind4.5 | ⊢ (𝑀 ∈ ℤ → 𝜓) |
uzind4.6 | ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜒 → 𝜃)) |
Ref | Expression |
---|---|
uzind4 | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝜏) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eluzel2 9438 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ) | |
2 | eluzelz 9442 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
3 | eluzle 9445 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ≤ 𝑁) | |
4 | breq2 3969 | . . . 4 ⊢ (𝑚 = 𝑁 → (𝑀 ≤ 𝑚 ↔ 𝑀 ≤ 𝑁)) | |
5 | 4 | elrab 2868 | . . 3 ⊢ (𝑁 ∈ {𝑚 ∈ ℤ ∣ 𝑀 ≤ 𝑚} ↔ (𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁)) |
6 | 2, 3, 5 | sylanbrc 414 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ {𝑚 ∈ ℤ ∣ 𝑀 ≤ 𝑚}) |
7 | uzind4.1 | . . 3 ⊢ (𝑗 = 𝑀 → (𝜑 ↔ 𝜓)) | |
8 | uzind4.2 | . . 3 ⊢ (𝑗 = 𝑘 → (𝜑 ↔ 𝜒)) | |
9 | uzind4.3 | . . 3 ⊢ (𝑗 = (𝑘 + 1) → (𝜑 ↔ 𝜃)) | |
10 | uzind4.4 | . . 3 ⊢ (𝑗 = 𝑁 → (𝜑 ↔ 𝜏)) | |
11 | uzind4.5 | . . 3 ⊢ (𝑀 ∈ ℤ → 𝜓) | |
12 | breq2 3969 | . . . . . 6 ⊢ (𝑚 = 𝑘 → (𝑀 ≤ 𝑚 ↔ 𝑀 ≤ 𝑘)) | |
13 | 12 | elrab 2868 | . . . . 5 ⊢ (𝑘 ∈ {𝑚 ∈ ℤ ∣ 𝑀 ≤ 𝑚} ↔ (𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) |
14 | eluz2 9439 | . . . . . . 7 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) ↔ (𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) | |
15 | 14 | biimpri 132 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘) → 𝑘 ∈ (ℤ≥‘𝑀)) |
16 | 15 | 3expb 1186 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ (𝑘 ∈ ℤ ∧ 𝑀 ≤ 𝑘)) → 𝑘 ∈ (ℤ≥‘𝑀)) |
17 | 13, 16 | sylan2b 285 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑘 ∈ {𝑚 ∈ ℤ ∣ 𝑀 ≤ 𝑚}) → 𝑘 ∈ (ℤ≥‘𝑀)) |
18 | uzind4.6 | . . . 4 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝜒 → 𝜃)) | |
19 | 17, 18 | syl 14 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑘 ∈ {𝑚 ∈ ℤ ∣ 𝑀 ≤ 𝑚}) → (𝜒 → 𝜃)) |
20 | 7, 8, 9, 10, 11, 19 | uzind3 9271 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ {𝑚 ∈ ℤ ∣ 𝑀 ≤ 𝑚}) → 𝜏) |
21 | 1, 6, 20 | syl2anc 409 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝜏) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 963 = wceq 1335 ∈ wcel 2128 {crab 2439 class class class wbr 3965 ‘cfv 5169 (class class class)co 5821 1c1 7727 + caddc 7729 ≤ cle 7907 ℤcz 9161 ℤ≥cuz 9433 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-sep 4082 ax-pow 4135 ax-pr 4169 ax-un 4393 ax-setind 4495 ax-cnex 7817 ax-resscn 7818 ax-1cn 7819 ax-1re 7820 ax-icn 7821 ax-addcl 7822 ax-addrcl 7823 ax-mulcl 7824 ax-addcom 7826 ax-addass 7828 ax-distr 7830 ax-i2m1 7831 ax-0lt1 7832 ax-0id 7834 ax-rnegex 7835 ax-cnre 7837 ax-pre-ltirr 7838 ax-pre-ltwlin 7839 ax-pre-lttrn 7840 ax-pre-ltadd 7842 |
This theorem depends on definitions: df-bi 116 df-3or 964 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-nel 2423 df-ral 2440 df-rex 2441 df-reu 2442 df-rab 2444 df-v 2714 df-sbc 2938 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3773 df-int 3808 df-br 3966 df-opab 4026 df-mpt 4027 df-id 4253 df-xp 4591 df-rel 4592 df-cnv 4593 df-co 4594 df-dm 4595 df-rn 4596 df-res 4597 df-ima 4598 df-iota 5134 df-fun 5171 df-fn 5172 df-f 5173 df-fv 5177 df-riota 5777 df-ov 5824 df-oprab 5825 df-mpo 5826 df-pnf 7908 df-mnf 7909 df-xr 7910 df-ltxr 7911 df-le 7912 df-sub 8042 df-neg 8043 df-inn 8828 df-n0 9085 df-z 9162 df-uz 9434 |
This theorem is referenced by: uzind4ALT 9494 uzind4s 9495 uzind4s2 9496 uzind4i 9497 frec2uzrand 10297 uzsinds 10334 seq3fveq2 10361 seq3shft2 10365 monoord 10368 seq3split 10371 seq3id2 10401 seq3homo 10402 seq3z 10403 leexp2r 10466 cvgratnnlemnexp 11414 cvgratnnlemmn 11415 clim2prod 11429 fprodabs 11506 dvdsfac 11744 zsupcllemex 11825 ennnfonelemkh 12124 |
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