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| Mirrors > Home > ILE Home > Th. List > rpmulcld | GIF version | ||
| Description: Closure law for multiplication of positive reals. Part of Axiom 7 of [Apostol] p. 20. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| rpred.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ+) |
| rpaddcld.1 | ⊢ (𝜑 → 𝐵 ∈ ℝ+) |
| Ref | Expression |
|---|---|
| rpmulcld | ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℝ+) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rpred.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ+) | |
| 2 | rpaddcld.1 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℝ+) | |
| 3 | rpmulcl 10062 | . 2 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → (𝐴 · 𝐵) ∈ ℝ+) | |
| 4 | 1, 2, 3 | syl2anc 415 | 1 ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℝ+) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2209 (class class class)co 6079 · cmul 8178 ℝ+crp 10037 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4247 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-cnex 8264 ax-resscn 8265 ax-1re 8267 ax-addrcl 8270 ax-mulrcl 8272 ax-rnegex 8282 ax-pre-mulgt0 8290 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-br 4129 df-opab 4191 df-xp 4778 df-pnf 8356 df-mnf 8357 df-ltxr 8359 df-rp 10038 |
| This theorem is referenced by: qbtwnrelemcalc 10673 cvg1nlemcxze 11731 cvg1nlemres 11734 resqrexlemnm 11767 resqrexlemcvg 11768 reccn2ap 12062 cvgratnnlembern 12273 cvgratnnlemrate 12280 cvgratnn 12281 eirraplem 12527 cosordlem 15933 rpmulcxp 15994 log2tlbndlog2 16065 lgsquadlem2 16180 |
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