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| Mirrors > Home > ILE Home > Th. List > resqrexlem1arp | GIF version | ||
| Description: Lemma for resqrex 11591. 1 + 𝐴 is a positive real (expressed in a way that will help apply seqf 10727 and similar theorems). (Contributed by Jim Kingdon, 28-Jul-2021.) (Revised by Jim Kingdon, 16-Oct-2022.) |
| Ref | Expression |
|---|---|
| resqrexlem1arp.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| resqrexlem1arp.agt0 | ⊢ (𝜑 → 0 ≤ 𝐴) |
| Ref | Expression |
|---|---|
| resqrexlem1arp | ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → ((ℕ × {(1 + 𝐴)})‘𝑁) ∈ ℝ+) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1red 8194 | . . . . 5 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → 1 ∈ ℝ) | |
| 2 | resqrexlem1arp.a | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 3 | 2 | adantr 276 | . . . . 5 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → 𝐴 ∈ ℝ) |
| 4 | 1, 3 | readdcld 8209 | . . . 4 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → (1 + 𝐴) ∈ ℝ) |
| 5 | 0lt1 8306 | . . . . . 6 ⊢ 0 < 1 | |
| 6 | 5 | a1i 9 | . . . . 5 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → 0 < 1) |
| 7 | resqrexlem1arp.agt0 | . . . . . 6 ⊢ (𝜑 → 0 ≤ 𝐴) | |
| 8 | 7 | adantr 276 | . . . . 5 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → 0 ≤ 𝐴) |
| 9 | addgtge0 8630 | . . . . 5 ⊢ (((1 ∈ ℝ ∧ 𝐴 ∈ ℝ) ∧ (0 < 1 ∧ 0 ≤ 𝐴)) → 0 < (1 + 𝐴)) | |
| 10 | 1, 3, 6, 8, 9 | syl22anc 1274 | . . . 4 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → 0 < (1 + 𝐴)) |
| 11 | 4, 10 | elrpd 9928 | . . 3 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → (1 + 𝐴) ∈ ℝ+) |
| 12 | fvconst2g 5868 | . . 3 ⊢ (((1 + 𝐴) ∈ ℝ+ ∧ 𝑁 ∈ ℕ) → ((ℕ × {(1 + 𝐴)})‘𝑁) = (1 + 𝐴)) | |
| 13 | 11, 12 | sylancom 420 | . 2 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → ((ℕ × {(1 + 𝐴)})‘𝑁) = (1 + 𝐴)) |
| 14 | 13, 11 | eqeltrd 2308 | 1 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → ((ℕ × {(1 + 𝐴)})‘𝑁) ∈ ℝ+) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1397 ∈ wcel 2202 {csn 3669 class class class wbr 4088 × cxp 4723 ‘cfv 5326 (class class class)co 6018 ℝcr 8031 0cc0 8032 1c1 8033 + caddc 8035 < clt 8214 ≤ cle 8215 ℕcn 9143 ℝ+crp 9888 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-addcom 8132 ax-addass 8134 ax-i2m1 8137 ax-0lt1 8138 ax-0id 8140 ax-rnegex 8141 ax-pre-ltwlin 8145 ax-pre-ltadd 8148 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-fv 5334 df-ov 6021 df-pnf 8216 df-mnf 8217 df-xr 8218 df-ltxr 8219 df-le 8220 df-rp 9889 |
| This theorem is referenced by: resqrexlemf 11572 resqrexlemf1 11573 resqrexlemfp1 11574 |
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