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| Mirrors > Home > ILE Home > Th. List > ltm1sr | GIF version | ||
| Description: Adding minus one to a signed real yields a smaller signed real. (Contributed by Jim Kingdon, 21-Jan-2024.) |
| Ref | Expression |
|---|---|
| ltm1sr | ⊢ (𝐴 ∈ R → (𝐴 +R -1R) <R 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | m1r 8119 | . . . . . 6 ⊢ -1R ∈ R | |
| 2 | addclsr 8120 | . . . . . 6 ⊢ ((𝐴 ∈ R ∧ -1R ∈ R) → (𝐴 +R -1R) ∈ R) | |
| 3 | 1, 2 | mpan2 429 | . . . . 5 ⊢ (𝐴 ∈ R → (𝐴 +R -1R) ∈ R) |
| 4 | ltadd1sr 8143 | . . . . 5 ⊢ ((𝐴 +R -1R) ∈ R → (𝐴 +R -1R) <R ((𝐴 +R -1R) +R 1R)) | |
| 5 | 3, 4 | syl 14 | . . . 4 ⊢ (𝐴 ∈ R → (𝐴 +R -1R) <R ((𝐴 +R -1R) +R 1R)) |
| 6 | 1sr 8118 | . . . . 5 ⊢ 1R ∈ R | |
| 7 | addasssrg 8123 | . . . . 5 ⊢ ((𝐴 ∈ R ∧ -1R ∈ R ∧ 1R ∈ R) → ((𝐴 +R -1R) +R 1R) = (𝐴 +R (-1R +R 1R))) | |
| 8 | 1, 6, 7 | mp3an23 1370 | . . . 4 ⊢ (𝐴 ∈ R → ((𝐴 +R -1R) +R 1R) = (𝐴 +R (-1R +R 1R))) |
| 9 | 5, 8 | breqtrd 4156 | . . 3 ⊢ (𝐴 ∈ R → (𝐴 +R -1R) <R (𝐴 +R (-1R +R 1R))) |
| 10 | m1p1sr 8127 | . . . 4 ⊢ (-1R +R 1R) = 0R | |
| 11 | 10 | oveq2i 6096 | . . 3 ⊢ (𝐴 +R (-1R +R 1R)) = (𝐴 +R 0R) |
| 12 | 9, 11 | breqtrdi 4171 | . 2 ⊢ (𝐴 ∈ R → (𝐴 +R -1R) <R (𝐴 +R 0R)) |
| 13 | 0idsr 8134 | . 2 ⊢ (𝐴 ∈ R → (𝐴 +R 0R) = 𝐴) | |
| 14 | 12, 13 | breqtrd 4156 | 1 ⊢ (𝐴 ∈ R → (𝐴 +R -1R) <R 𝐴) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ∈ wcel 2209 class class class wbr 4130 (class class class)co 6085 Rcnr 7664 0Rc0r 7665 1Rc1r 7666 -1Rcm1r 7667 +R cplr 7668 <R cltr 7670 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4246 ax-sep 4249 ax-nul 4259 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-iinf 4735 |
| This proof depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-br 4131 df-opab 4193 df-mpt 4194 df-tr 4230 df-eprel 4434 df-id 4438 df-po 4441 df-iso 4442 df-iord 4511 df-on 4513 df-suc 4516 df-iom 4738 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-ov 6088 df-oprab 6089 df-mpo 6090 df-1st 6374 df-2nd 6375 df-recs 6576 df-irdg 6641 df-1o 6687 df-2o 6688 df-oadd 6691 df-omul 6692 df-er 6807 df-ec 6809 df-qs 6813 df-ni 7671 df-pli 7672 df-mi 7673 df-lti 7674 df-plpq 7711 df-mpq 7712 df-enq 7714 df-nqqs 7715 df-plqqs 7716 df-mqqs 7717 df-1nqqs 7718 df-rq 7719 df-ltnqqs 7720 df-enq0 7791 df-nq0 7792 df-0nq0 7793 df-plq0 7794 df-mq0 7795 df-inp 7833 df-i1p 7834 df-iplp 7835 df-iltp 7837 df-enr 8093 df-nr 8094 df-plr 8095 df-ltr 8097 df-0r 8098 df-1r 8099 df-m1r 8100 |
| This theorem is used by: suplocsrlem 8175 |
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