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| Mirrors > Home > MPE Home > Th. List > ltlen | Structured version Visualization version GIF version | ||
| Description: 'Less than' expressed in terms of 'less than or equal to'. (Contributed by NM, 27-Oct-1999.) |
| Ref | Expression |
|---|---|
| ltlen | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 ↔ (𝐴 ≤ 𝐵 ∧ 𝐵 ≠ 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltle 11323 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → 𝐴 ≤ 𝐵)) | |
| 2 | ltne 11332 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 < 𝐵) → 𝐵 ≠ 𝐴) | |
| 3 | 2 | ex 418 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 < 𝐵 → 𝐵 ≠ 𝐴)) |
| 4 | 3 | adantr 486 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → 𝐵 ≠ 𝐴)) |
| 5 | 1, 4 | jcad 522 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → (𝐴 ≤ 𝐵 ∧ 𝐵 ≠ 𝐴))) |
| 6 | leloe 11321 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) | |
| 7 | df-ne 2956 | . . . . . 6 ⊢ (𝐵 ≠ 𝐴 ↔ ¬ 𝐵 = 𝐴) | |
| 8 | pm2.24 125 | . . . . . . 7 ⊢ (𝐵 = 𝐴 → (¬ 𝐵 = 𝐴 → 𝐴 < 𝐵)) | |
| 9 | 8 | eqcoms 2768 | . . . . . 6 ⊢ (𝐴 = 𝐵 → (¬ 𝐵 = 𝐴 → 𝐴 < 𝐵)) |
| 10 | 7, 9 | biimtrid 245 | . . . . 5 ⊢ (𝐴 = 𝐵 → (𝐵 ≠ 𝐴 → 𝐴 < 𝐵)) |
| 11 | 10 | jao1i 872 | . . . 4 ⊢ ((𝐴 < 𝐵 ∨ 𝐴 = 𝐵) → (𝐵 ≠ 𝐴 → 𝐴 < 𝐵)) |
| 12 | 6, 11 | biimtrdi 256 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 → (𝐵 ≠ 𝐴 → 𝐴 < 𝐵))) |
| 13 | 12 | impd 416 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 ≤ 𝐵 ∧ 𝐵 ≠ 𝐴) → 𝐴 < 𝐵)) |
| 14 | 5, 13 | impbid 215 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 ↔ (𝐴 ≤ 𝐵 ∧ 𝐵 ≠ 𝐴))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∨ wo 861 = wceq 1570 ∈ wcel 2145 ≠ wne 2955 class class class wbr 5103 ℝcr 11124 < clt 11268 ≤ cle 11269 |
| 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 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-resscn 11182 ax-pre-lttri 11199 ax-pre-lttrn 11200 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 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 5550 df-po 5563 df-so 5564 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-er 8697 df-en 8954 df-dom 8955 df-sdom 8956 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 |
| This theorem is used by: ltleni 11353 ltlend 11380 nn0lt2 12685 rpneg 13077 fzofzim 13766 elfznelfzob 13831 hashsdom 14446 cnpart 15328 oddprmgt2 16791 chfacfisf 23080 chfacfisfcpmat 23081 ang180lem2 27048 mumullem2 27417 lgsneg 27558 lgsdilem 27561 lgsdirprm 27568 2sqreultlem 27684 2sqreunnltlem 27687 axlowdimlem16 29415 unitdivcld 34412 zltp1ne 35715 poimirlem24 38394 itg2addnclem 38421 fzopredsuc 48213 iccpartiltu 48323 icceuelpartlem 48336 |
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