| Mathbox for Steven Nguyen |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > sn-addgt0d | Structured version Visualization version GIF version | ||
| Description: The sum of positive numbers is positive. Proof of addgt0d 11721 without ax-mulcom 11098. (Contributed by SN, 25-Jan-2025.) |
| Ref | Expression |
|---|---|
| sn-addgt0d.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| sn-addgt0d.b | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| sn-addgt0d.1 | ⊢ (𝜑 → 0 < 𝐴) |
| sn-addgt0d.2 | ⊢ (𝜑 → 0 < 𝐵) |
| Ref | Expression |
|---|---|
| sn-addgt0d | ⊢ (𝜑 → 0 < (𝐴 + 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0red 11143 | . 2 ⊢ (𝜑 → 0 ∈ ℝ) | |
| 2 | sn-addgt0d.a | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 3 | sn-addgt0d.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 4 | 2, 3 | readdcld 11170 | . 2 ⊢ (𝜑 → (𝐴 + 𝐵) ∈ ℝ) |
| 5 | sn-addgt0d.1 | . 2 ⊢ (𝜑 → 0 < 𝐴) | |
| 6 | sn-addgt0d.2 | . . 3 ⊢ (𝜑 → 0 < 𝐵) | |
| 7 | sn-ltaddpos 42956 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 < 𝐵 ↔ 𝐴 < (𝐴 + 𝐵))) | |
| 8 | 3, 2, 7 | syl2anc 591 | . . 3 ⊢ (𝜑 → (0 < 𝐵 ↔ 𝐴 < (𝐴 + 𝐵))) |
| 9 | 6, 8 | mpbid 234 | . 2 ⊢ (𝜑 → 𝐴 < (𝐴 + 𝐵)) |
| 10 | 1, 2, 4, 5, 9 | lttrd 11303 | 1 ⊢ (𝜑 → 0 < (𝐴 + 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∈ wcel 2121 class class class wbr 5074 (class class class)co 7359 ℝcr 11033 0cc0 11034 + caddc 11037 < clt 11175 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-sep 5220 ax-nul 5230 ax-pow 5296 ax-pr 5364 ax-un 7681 ax-resscn 11091 ax-1cn 11092 ax-icn 11093 ax-addcl 11094 ax-addrcl 11095 ax-mulcl 11096 ax-mulrcl 11097 ax-addass 11099 ax-mulass 11100 ax-distr 11101 ax-i2m1 11102 ax-1ne0 11103 ax-1rid 11104 ax-rnegex 11105 ax-rrecex 11106 ax-cnre 11107 ax-pre-lttri 11108 ax-pre-lttrn 11109 ax-pre-ltadd 11110 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-nel 3041 df-ral 3056 df-rex 3066 df-rmo 3346 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3725 df-csb 3833 df-dif 3887 df-un 3889 df-in 3891 df-ss 3901 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-br 5075 df-opab 5137 df-mpt 5156 df-id 5515 df-po 5528 df-so 5529 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-riota 7316 df-ov 7362 df-oprab 7363 df-mpo 7364 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 df-pnf 11177 df-mnf 11178 df-ltxr 11180 df-2 12239 df-3 12240 df-resub 42856 |
| This theorem is referenced by: sn-nnne0 42963 |
| Copyright terms: Public domain | W3C validator |