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| Mirrors > Home > MPE Home > Th. List > addcompr | Structured version Visualization version GIF version | ||
| Description: Addition of positive reals is commutative. Proposition 9-3.5(ii) of [Gleason] p. 123. (Contributed by NM, 19-Nov-1995.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| addcompr | ⊢ (𝐴 +P 𝐵) = (𝐵 +P 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | plpv 10958 | . . 3 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (𝐴 +P 𝐵) = {𝑥 ∣ ∃𝑧 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝑥 = (𝑧 +Q 𝑦)}) | |
| 2 | plpv 10958 | . . . . 5 ⊢ ((𝐵 ∈ P ∧ 𝐴 ∈ P) → (𝐵 +P 𝐴) = {𝑥 ∣ ∃𝑦 ∈ 𝐵 ∃𝑧 ∈ 𝐴 𝑥 = (𝑦 +Q 𝑧)}) | |
| 3 | addcomnq 10899 | . . . . . . . . 9 ⊢ (𝑦 +Q 𝑧) = (𝑧 +Q 𝑦) | |
| 4 | 3 | eqeq2i 2769 | . . . . . . . 8 ⊢ (𝑥 = (𝑦 +Q 𝑧) ↔ 𝑥 = (𝑧 +Q 𝑦)) |
| 5 | 4 | 2rexbii 3132 | . . . . . . 7 ⊢ (∃𝑦 ∈ 𝐵 ∃𝑧 ∈ 𝐴 𝑥 = (𝑦 +Q 𝑧) ↔ ∃𝑦 ∈ 𝐵 ∃𝑧 ∈ 𝐴 𝑥 = (𝑧 +Q 𝑦)) |
| 6 | rexcom 3285 | . . . . . . 7 ⊢ (∃𝑦 ∈ 𝐵 ∃𝑧 ∈ 𝐴 𝑥 = (𝑧 +Q 𝑦) ↔ ∃𝑧 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝑥 = (𝑧 +Q 𝑦)) | |
| 7 | 5, 6 | bitri 277 | . . . . . 6 ⊢ (∃𝑦 ∈ 𝐵 ∃𝑧 ∈ 𝐴 𝑥 = (𝑦 +Q 𝑧) ↔ ∃𝑧 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝑥 = (𝑧 +Q 𝑦)) |
| 8 | 7 | abbii 2823 | . . . . 5 ⊢ {𝑥 ∣ ∃𝑦 ∈ 𝐵 ∃𝑧 ∈ 𝐴 𝑥 = (𝑦 +Q 𝑧)} = {𝑥 ∣ ∃𝑧 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝑥 = (𝑧 +Q 𝑦)} |
| 9 | 2, 8 | eqtrdi 2807 | . . . 4 ⊢ ((𝐵 ∈ P ∧ 𝐴 ∈ P) → (𝐵 +P 𝐴) = {𝑥 ∣ ∃𝑧 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝑥 = (𝑧 +Q 𝑦)}) |
| 10 | 9 | ancoms 461 | . . 3 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (𝐵 +P 𝐴) = {𝑥 ∣ ∃𝑧 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝑥 = (𝑧 +Q 𝑦)}) |
| 11 | 1, 10 | eqtr4d 2794 | . 2 ⊢ ((𝐴 ∈ P ∧ 𝐵 ∈ P) → (𝐴 +P 𝐵) = (𝐵 +P 𝐴)) |
| 12 | dmplp 10960 | . . 3 ⊢ dom +P = (P × P) | |
| 13 | 12 | ndmovcom 7572 | . 2 ⊢ (¬ (𝐴 ∈ P ∧ 𝐵 ∈ P) → (𝐴 +P 𝐵) = (𝐵 +P 𝐴)) |
| 14 | 11, 13 | pm2.61i 183 | 1 ⊢ (𝐴 +P 𝐵) = (𝐵 +P 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 398 = wceq 1554 ∈ wcel 2136 {cab 2734 ∃wrex 3080 (class class class)co 7385 +Q cplq 10803 Pcnp 10807 +P cpp 10809 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1809 ax-4 1823 ax-5 1924 ax-6 1981 ax-7 2022 ax-8 2138 ax-9 2146 ax-10 2169 ax-11 2185 ax-12 2206 ax-ext 2728 ax-sep 5240 ax-nul 5250 ax-pow 5316 ax-pr 5384 ax-un 7707 ax-inf2 9586 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3or 1096 df-3an 1097 df-tru 1557 df-fal 1567 df-ex 1794 df-nf 1798 df-sb 2085 df-mo 2560 df-eu 2590 df-clab 2735 df-cleq 2748 df-clel 2831 df-nfc 2905 df-ne 2952 df-ral 3071 df-rex 3081 df-rmo 3361 df-reu 3362 df-rab 3409 df-v 3450 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4281 df-if 4475 df-pw 4551 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-iun 4945 df-br 5095 df-opab 5157 df-mpt 5176 df-tr 5202 df-id 5535 df-eprel 5540 df-po 5548 df-so 5549 df-fr 5593 df-we 5595 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-pred 6277 df-ord 6338 df-on 6339 df-lim 6340 df-suc 6341 df-iota 6466 df-fun 6512 df-fn 6513 df-f 6514 df-f1 6515 df-fo 6516 df-f1o 6517 df-fv 6518 df-ov 7388 df-oprab 7389 df-mpo 7390 df-om 7836 df-1st 7959 df-2nd 7960 df-frecs 8250 df-wrecs 8281 df-recs 8330 df-rdg 8369 df-1o 8425 df-oadd 8429 df-omul 8430 df-er 8666 df-ni 10820 df-pli 10821 df-mi 10822 df-lti 10823 df-plpq 10856 df-enq 10859 df-nq 10860 df-erq 10861 df-plq 10862 df-1nq 10864 df-np 10929 df-plp 10931 |
| This theorem is referenced by: enrer 11011 addcmpblnr 11017 mulcmpblnrlem 11018 ltsrpr 11025 addcomsr 11035 mulcomsr 11037 mulasssr 11038 distrsr 11039 ltsosr 11042 0lt1sr 11043 0idsr 11045 1idsr 11046 ltasr 11048 recexsrlem 11051 mulgt0sr 11053 ltpsrpr 11057 map2psrpr 11058 |
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