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| Mirrors > Home > ILE Home > Th. List > seqm1g | GIF version | ||
| Description: Value of the sequence builder function at a successor. (Contributed by Mario Carneiro, 24-Jun-2013.) (Revised by Jim Kingdon, 30-Aug-2025.) |
| Ref | Expression |
|---|---|
| seqm1g.m | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| seqm1g.n | ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘(𝑀 + 1))) |
| seqm1g.p | ⊢ (𝜑 → + ∈ 𝑉) |
| seqm1g.f | ⊢ (𝜑 → 𝐹 ∈ 𝑊) |
| Ref | Expression |
|---|---|
| seqm1g | ⊢ (𝜑 → (seq𝑀( + , 𝐹)‘𝑁) = ((seq𝑀( + , 𝐹)‘(𝑁 − 1)) + (𝐹‘𝑁))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | seqm1g.m | . 2 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
| 2 | seqm1g.n | . 2 ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘(𝑀 + 1))) | |
| 3 | seqm1g.f | . . 3 ⊢ (𝜑 → 𝐹 ∈ 𝑊) | |
| 4 | fvexg 5607 | . . 3 ⊢ ((𝐹 ∈ 𝑊 ∧ 𝑥 ∈ (ℤ≥‘𝑀)) → (𝐹‘𝑥) ∈ V) | |
| 5 | 3, 4 | sylan 283 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ≥‘𝑀)) → (𝐹‘𝑥) ∈ V) |
| 6 | simprl 529 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ V ∧ 𝑦 ∈ V)) → 𝑥 ∈ V) | |
| 7 | seqm1g.p | . . . 4 ⊢ (𝜑 → + ∈ 𝑉) | |
| 8 | 7 | adantr 276 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ V ∧ 𝑦 ∈ V)) → + ∈ 𝑉) |
| 9 | simprr 531 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ V ∧ 𝑦 ∈ V)) → 𝑦 ∈ V) | |
| 10 | ovexg 5990 | . . 3 ⊢ ((𝑥 ∈ V ∧ + ∈ 𝑉 ∧ 𝑦 ∈ V) → (𝑥 + 𝑦) ∈ V) | |
| 11 | 6, 8, 9, 10 | syl3anc 1250 | . 2 ⊢ ((𝜑 ∧ (𝑥 ∈ V ∧ 𝑦 ∈ V)) → (𝑥 + 𝑦) ∈ V) |
| 12 | 1, 2, 5, 11 | seq3m1 10635 | 1 ⊢ (𝜑 → (seq𝑀( + , 𝐹)‘𝑁) = ((seq𝑀( + , 𝐹)‘(𝑁 − 1)) + (𝐹‘𝑁))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1373 ∈ wcel 2177 Vcvv 2773 ‘cfv 5279 (class class class)co 5956 1c1 7941 + caddc 7943 − cmin 8258 ℤcz 9387 ℤ≥cuz 9663 seqcseq 10609 |
| 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 4166 ax-sep 4169 ax-nul 4177 ax-pow 4225 ax-pr 4260 ax-un 4487 ax-setind 4592 ax-iinf 4643 ax-cnex 8031 ax-resscn 8032 ax-1cn 8033 ax-1re 8034 ax-icn 8035 ax-addcl 8036 ax-addrcl 8037 ax-mulcl 8038 ax-addcom 8040 ax-addass 8042 ax-distr 8044 ax-i2m1 8045 ax-0lt1 8046 ax-0id 8048 ax-rnegex 8049 ax-cnre 8051 ax-pre-ltirr 8052 ax-pre-ltwlin 8053 ax-pre-lttrn 8054 ax-pre-ltadd 8056 |
| This theorem depends on definitions: df-bi 117 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 3622 df-sn 3643 df-pr 3644 df-op 3646 df-uni 3856 df-int 3891 df-iun 3934 df-br 4051 df-opab 4113 df-mpt 4114 df-tr 4150 df-id 4347 df-iord 4420 df-on 4422 df-ilim 4423 df-suc 4425 df-iom 4646 df-xp 4688 df-rel 4689 df-cnv 4690 df-co 4691 df-dm 4692 df-rn 4693 df-res 4694 df-ima 4695 df-iota 5240 df-fun 5281 df-fn 5282 df-f 5283 df-f1 5284 df-fo 5285 df-f1o 5286 df-fv 5287 df-riota 5911 df-ov 5959 df-oprab 5960 df-mpo 5961 df-1st 6238 df-2nd 6239 df-recs 6403 df-frec 6489 df-pnf 8124 df-mnf 8125 df-xr 8126 df-ltxr 8127 df-le 8128 df-sub 8260 df-neg 8261 df-inn 9052 df-n0 9311 df-z 9388 df-uz 9664 df-seqfrec 10610 |
| This theorem is referenced by: seqf1oglem2 10682 |
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