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| Mirrors > Home > MPE Home > Th. List > neg1lt0 | Structured version Visualization version GIF version | ||
| Description: -1 is less than 0. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| neg1lt0 | ⊢ -1 < 0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0lt1 11838 | . 2 ⊢ 0 < 1 | |
| 2 | 1re 11308 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | lt0neg2 11823 | . . 3 ⊢ (1 ∈ ℝ → (0 < 1 ↔ -1 < 0)) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (0 < 1 ↔ -1 < 0) |
| 5 | 1, 4 | mpbi 233 | 1 ⊢ -1 < 0 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∈ wcel 2145 class class class wbr 5103 ℝcr 11199 0cc0 11200 1c1 11201 < clt 11343 -cneg 11542 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 |
| This theorem is used by: inelr 12310 fz00m1 13679 sgnnbi 15257 sgnpbi 15258 sgnmulsgn 15262 binomfallfaclem2 16206 nthruz 16421 chnub 18796 psgnodpmr 21896 xrhmph 25268 vitalilem4 25932 vitali 25934 atanre 27213 lgsdir2lem3 27654 sgnsgn 33422 cos9thpiminplylem1 34414 ballotlem1c 35140 signswch 35190 fz0n 36496 bcneg1 36501 cnndvlem1 37403 irrdiff 38247 asindmre 38621 stoweidlem7 47016 stirlinglem6 47088 fouriersw 47240 dignn0flhalflem1 49726 |
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