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| Mirrors > Home > MPE Home > Th. List > addcomsr | Structured version Visualization version GIF version | ||
| Description: Addition of signed reals is commutative. (Contributed by NM, 31-Aug-1995.) (Revised by Mario Carneiro, 28-Apr-2015.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| addcomsr | ⊢ (𝐴 +R 𝐵) = (𝐵 +R 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-nr 11146 | . . 3 ⊢ R = ((P × P) / ~R ) | |
| 2 | addsrpr 11165 | . . 3 ⊢ (((𝑥 ∈ P ∧ 𝑦 ∈ P) ∧ (𝑧 ∈ P ∧ 𝑤 ∈ P)) → ([〈𝑥, 𝑦〉] ~R +R [〈𝑧, 𝑤〉] ~R ) = [〈(𝑥 +P 𝑧), (𝑦 +P 𝑤)〉] ~R ) | |
| 3 | addsrpr 11165 | . . 3 ⊢ (((𝑧 ∈ P ∧ 𝑤 ∈ P) ∧ (𝑥 ∈ P ∧ 𝑦 ∈ P)) → ([〈𝑧, 𝑤〉] ~R +R [〈𝑥, 𝑦〉] ~R ) = [〈(𝑧 +P 𝑥), (𝑤 +P 𝑦)〉] ~R ) | |
| 4 | addcompr 11111 | . . 3 ⊢ (𝑥 +P 𝑧) = (𝑧 +P 𝑥) | |
| 5 | addcompr 11111 | . . 3 ⊢ (𝑦 +P 𝑤) = (𝑤 +P 𝑦) | |
| 6 | 1, 2, 3, 4, 5 | ecovcom 8849 | . 2 ⊢ ((𝐴 ∈ R ∧ 𝐵 ∈ R) → (𝐴 +R 𝐵) = (𝐵 +R 𝐴)) |
| 7 | dmaddsr 11175 | . . 3 ⊢ dom +R = (R × R) | |
| 8 | 7 | ndmovcom 7610 | . 2 ⊢ (¬ (𝐴 ∈ R ∧ 𝐵 ∈ R) → (𝐴 +R 𝐵) = (𝐵 +R 𝐴)) |
| 9 | 6, 8 | pm2.61i 184 | 1 ⊢ (𝐴 +R 𝐵) = (𝐵 +R 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1569 ∈ wcel 2144 (class class class)co 7422 Pcnp 10949 +P cpp 10951 ~R cer 10954 Rcnr 10955 +R cplr 10959 |
| 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 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7753 ax-inf2 9647 |
| 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 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-ov 7425 df-oprab 7426 df-mpo 7427 df-om 7880 df-1st 8003 df-2nd 8004 df-frecs 8304 df-wrecs 8335 df-recs 8384 df-rdg 8423 df-1o 8481 df-oadd 8485 df-omul 8486 df-er 8722 df-ec 8724 df-qs 8728 df-ni 10962 df-pli 10963 df-mi 10964 df-lti 10965 df-plpq 10998 df-mpq 10999 df-ltpq 11000 df-enq 11001 df-nq 11002 df-erq 11003 df-plq 11004 df-mq 11005 df-1nq 11006 df-rq 11007 df-ltnq 11008 df-np 11071 df-plp 11073 df-ltp 11075 df-enr 11145 df-nr 11146 df-plr 11147 |
| This theorem is used by: pn0sr 11191 sqgt0sr 11196 map2psrpr 11200 axmulcom 11245 axmulass 11247 axdistr 11248 axi2m1 11249 axcnre 11254 |
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