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| Mirrors > Home > MPE Home > Th. List > ltaddpr2 | Structured version Visualization version GIF version | ||
| Description: The sum of two positive reals is greater than one of them. (Contributed by NM, 13-May-1996.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| ltaddpr2 | ⊢ (𝐶 ∈ P → ((𝐴 +P 𝐵) = 𝐶 → 𝐴<P 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq1 2852 | . . 3 ⊢ ((𝐴 +P 𝐵) = 𝐶 → ((𝐴 +P 𝐵) ∈ P ↔ 𝐶 ∈ P)) | |
| 2 | dmplp 11110 | . . . 4 ⊢ dom +P = (P × P) | |
| 3 | 0npr 11090 | . . . 4 ⊢ ¬ ∅ ∈ P | |
| 4 | 2, 3 | ndmovrcl 7617 | . . 3 ⊢ ((𝐴 +P 𝐵) ∈ P → (𝐴 ∈ P ∧ 𝐵 ∈ P)) |
| 5 | 1, 4 | biimtrrdi 257 | . 2 ⊢ ((𝐴 +P 𝐵) = 𝐶 → (𝐶 ∈ P → (𝐴 ∈ P ∧ 𝐵 ∈ P))) |
| 6 | ltaddpr 11132 | . . 3 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → 𝐴<P (𝐴 +P 𝐵)) | |
| 7 | breq2 5110 | . . 3 ⊢ ((𝐴 +P 𝐵) = 𝐶 → (𝐴<P (𝐴 +P 𝐵) ↔ 𝐴<P 𝐶)) | |
| 8 | 6, 7 | imbitrid 247 | . 2 ⊢ ((𝐴 +P 𝐵) = 𝐶 → ((𝐴 ∈ P ∧ 𝐵 ∈ P) → 𝐴<P 𝐶)) |
| 9 | 5, 8 | syldc 49 | 1 ⊢ (𝐶 ∈ P → ((𝐴 +P 𝐵) = 𝐶 → 𝐴<P 𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2146 class class class wbr 5106 (class class class)co 7430 Pcnp 10957 +P cpp 10959 <P cltp 10961 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 ax-inf2 9655 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6311 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7888 df-1st 8011 df-2nd 8012 df-frecs 8313 df-wrecs 8344 df-recs 8393 df-rdg 8432 df-1o 8490 df-oadd 8494 df-omul 8495 df-er 8731 df-ni 10970 df-pli 10971 df-mi 10972 df-lti 10973 df-plpq 11006 df-mpq 11007 df-ltpq 11008 df-enq 11009 df-nq 11010 df-erq 11011 df-plq 11012 df-mq 11013 df-1nq 11014 df-rq 11015 df-ltnq 11016 df-np 11079 df-plp 11081 df-ltp 11083 |
| This theorem is used by: mulgt0sr 11203 |
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