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| Mirrors > Home > MPE Home > Th. List > ltnlei | Structured version Visualization version GIF version | ||
| Description: 'Less than' in terms of 'less than or equal to'. (Contributed by NM, 11-Jul-2005.) |
| Ref | Expression |
|---|---|
| lt.1 | ⊢ 𝐴 ∈ ℝ |
| lt.2 | ⊢ 𝐵 ∈ ℝ |
| Ref | Expression |
|---|---|
| ltnlei | ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lt.2 | . . 3 ⊢ 𝐵 ∈ ℝ | |
| 2 | lt.1 | . . 3 ⊢ 𝐴 ∈ ℝ | |
| 3 | 1, 2 | lenlti 11430 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
| 4 | 3 | con2bii 360 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ↔ wb 209 ∈ wcel 2145 class class class wbr 5103 ℝcr 11199 < clt 11343 ≤ cle 11344 |
| 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-ext 2733 ax-sep 5249 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-xp 5657 df-cnv 5659 df-xr 11347 df-le 11349 |
| This theorem is used by: letrii 11435 nn0ge2m1nn 12676 0nelfz1 13676 fzpreddisj 13707 hashnn0n0nn 14535 hashge2el2dif 14625 hash3tpde 14638 divalglem5 16567 divalglem6 16568 sadcadd 16628 htpycc 25301 pco1 25336 pcohtpylem 25340 pcopt 25343 pcopt2 25344 pcoass 25345 pcorevlem 25347 vitalilem5 25933 vieta1lem2 26634 ppiltx 27504 ppiublem1 27529 chtub 27539 axlowdimlem16 29535 axlowdim 29539 lfgrnloop 29703 lfuhgr1v0e 29835 lfgrwlkprop 30270 ballotlem2 35121 subfacp1lem1 35944 subfacp1lem5 35949 bcneg1 36501 poimirlem9 38547 poimirlem16 38554 poimirlem17 38555 poimirlem19 38557 poimirlem20 38558 poimirlem22 38560 fdc 38679 pellexlem6 43840 jm2.23 44002 nprmdvdsfacm1lem2 48705 |
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