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| Mirrors > Home > MPE Home > Th. List > pn0sr | Structured version Visualization version GIF version | ||
| Description: A signed real plus its negative is zero. (Contributed by NM, 14-May-1996.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| pn0sr | ⊢ (𝐴 ∈ R → (𝐴 +R (𝐴 ·R -1R)) = 0R) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1idsr 11016 | . . 3 ⊢ (𝐴 ∈ R → (𝐴 ·R 1R) = 𝐴) | |
| 2 | 1 | oveq1d 7375 | . 2 ⊢ (𝐴 ∈ R → ((𝐴 ·R 1R) +R (𝐴 ·R -1R)) = (𝐴 +R (𝐴 ·R -1R))) |
| 3 | distrsr 11009 | . . . 4 ⊢ (𝐴 ·R (-1R +R 1R)) = ((𝐴 ·R -1R) +R (𝐴 ·R 1R)) | |
| 4 | m1p1sr 11010 | . . . . 5 ⊢ (-1R +R 1R) = 0R | |
| 5 | 4 | oveq2i 7371 | . . . 4 ⊢ (𝐴 ·R (-1R +R 1R)) = (𝐴 ·R 0R) |
| 6 | addcomsr 11005 | . . . 4 ⊢ ((𝐴 ·R -1R) +R (𝐴 ·R 1R)) = ((𝐴 ·R 1R) +R (𝐴 ·R -1R)) | |
| 7 | 3, 5, 6 | 3eqtr3i 2772 | . . 3 ⊢ (𝐴 ·R 0R) = ((𝐴 ·R 1R) +R (𝐴 ·R -1R)) |
| 8 | 00sr 11017 | . . 3 ⊢ (𝐴 ∈ R → (𝐴 ·R 0R) = 0R) | |
| 9 | 7, 8 | eqtr3id 2790 | . 2 ⊢ (𝐴 ∈ R → ((𝐴 ·R 1R) +R (𝐴 ·R -1R)) = 0R) |
| 10 | 2, 9 | eqtr3d 2778 | 1 ⊢ (𝐴 ∈ R → (𝐴 +R (𝐴 ·R -1R)) = 0R) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1548 ∈ wcel 2121 (class class class)co 7360 Rcnr 10783 0Rc0r 10784 1Rc1r 10785 -1Rcm1r 10786 +R cplr 10787 ·R cmr 10788 |
| 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 5221 ax-nul 5231 ax-pow 5297 ax-pr 5365 ax-un 7682 ax-inf2 9557 |
| 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-ral 3056 df-rex 3066 df-rmo 3346 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-int 4881 df-iun 4926 df-br 5076 df-opab 5138 df-mpt 5157 df-tr 5183 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-oadd 8403 df-omul 8404 df-er 8637 df-ec 8639 df-qs 8643 df-ni 10790 df-pli 10791 df-mi 10792 df-lti 10793 df-plpq 10826 df-mpq 10827 df-ltpq 10828 df-enq 10829 df-nq 10830 df-erq 10831 df-plq 10832 df-mq 10833 df-1nq 10834 df-rq 10835 df-ltnq 10836 df-np 10899 df-1p 10900 df-plp 10901 df-mp 10902 df-ltp 10903 df-enr 10973 df-nr 10974 df-plr 10975 df-mr 10976 df-0r 10978 df-1r 10979 df-m1r 10980 |
| This theorem is referenced by: negexsr 11020 sqgt0sr 11024 map2psrpr 11028 axrnegex 11080 |
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