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| Mirrors > Home > ILE Home > Th. List > resqrexlem1arp | GIF version | ||
| Description: Lemma for resqrex 11707. 1 + 𝐴 is a positive real (expressed in a way that will help apply seqf 10825 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 8288 | . . . . 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 8302 | . . . 4 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → (1 + 𝐴) ∈ ℝ) |
| 5 | 0lt1 8399 | . . . . . 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 8723 | . . . . 5 ⊢ (((1 ∈ ℝ ∧ 𝐴 ∈ ℝ) ∧ (0 < 1 ∧ 0 ≤ 𝐴)) → 0 < (1 + 𝐴)) | |
| 10 | 1, 3, 6, 8, 9 | syl22anc 1275 | . . . 4 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → 0 < (1 + 𝐴)) |
| 11 | 4, 10 | elrpd 10025 | . . 3 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → (1 + 𝐴) ∈ ℝ+) |
| 12 | fvconst2g 5897 | . . 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 2309 | 1 ⊢ ((𝜑 ∧ 𝑁 ∈ ℕ) → ((ℕ × {(1 + 𝐴)})‘𝑁) ∈ ℝ+) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 ∈ wcel 2203 {csn 3688 class class class wbr 4108 × cxp 4746 ‘cfv 5351 (class class class)co 6049 ℝcr 8125 0cc0 8126 1c1 8127 + caddc 8129 < clt 8307 ≤ cle 8308 ℕcn 9236 ℝ+crp 9985 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-cnex 8217 ax-resscn 8218 ax-1cn 8219 ax-1re 8220 ax-icn 8221 ax-addcl 8222 ax-addrcl 8223 ax-mulcl 8224 ax-addcom 8226 ax-addass 8228 ax-i2m1 8231 ax-0lt1 8232 ax-0id 8234 ax-rnegex 8235 ax-pre-ltwlin 8239 ax-pre-ltadd 8242 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2814 df-sbc 3042 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-br 4109 df-opab 4171 df-mpt 4172 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-fv 5359 df-ov 6052 df-pnf 8309 df-mnf 8310 df-xr 8311 df-ltxr 8312 df-le 8313 df-rp 9986 |
| This theorem is referenced by: resqrexlemf 11688 resqrexlemf1 11689 resqrexlemfp1 11690 |
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