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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 11347 | . 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 2146 class class class wbr 5111 ℝcr 11116 < clt 11260 ≤ cle 11261 |
| 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 2148 ax-9 2156 ax-ext 2737 ax-sep 5259 ax-pr 5406 |
| 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 2744 df-cleq 2757 df-clel 2840 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-br 5112 df-opab 5176 df-xp 5669 df-cnv 5671 df-xr 11264 df-le 11266 |
| This theorem is used by: letrii 11352 nn0ge2m1nn 12591 0nelfz1 13589 fzpreddisj 13620 hashnn0n0nn 14447 hashge2el2dif 14537 hash3tpde 14550 divalglem5 16479 divalglem6 16480 sadcadd 16540 htpycc 25192 pco1 25227 pcohtpylem 25231 pcopt 25234 pcopt2 25235 pcoass 25236 pcorevlem 25238 vitalilem5 25824 vieta1lem2 26525 ppiltx 27394 ppiublem1 27419 chtub 27429 axlowdimlem16 29364 axlowdim 29368 lfgrnloop 29532 lfuhgr1v0e 29664 lfgrwlkprop 30099 ballotlem2 34946 subfacp1lem1 35710 subfacp1lem5 35715 bcneg1 36267 poimirlem9 38339 poimirlem16 38346 poimirlem17 38347 poimirlem19 38349 poimirlem20 38350 poimirlem22 38352 fdc 38456 pellexlem6 43621 jm2.23 43783 nprmdvdsfacm1lem2 48433 |
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