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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 11398 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → 𝐴 ≤ 𝐵)) | |
| 2 | ltne 11407 | . . . . 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 11396 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) | |
| 7 | df-ne 2957 | . . . . . 6 ⊢ (𝐵 ≠ 𝐴 ↔ ¬ 𝐵 = 𝐴) | |
| 8 | pm2.24 125 | . . . . . . 7 ⊢ (𝐵 = 𝐴 → (¬ 𝐵 = 𝐴 → 𝐴 < 𝐵)) | |
| 9 | 8 | eqcoms 2769 | . . . . . 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 2956 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-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-pre-lttri 11274 ax-pre-lttrn 11275 |
| 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-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-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 |
| This theorem is used by: ltleni 11428 ltlend 11455 nn0lt2 12762 rpneg 13154 fzofzim 13844 elfznelfzob 13909 hashsdom 14525 cnpart 15407 oddprmgt2 16875 chfacfisf 23172 chfacfisfcpmat 23173 ang180lem2 27138 mumullem2 27507 lgsneg 27648 lgsdilem 27651 lgsdirprm 27658 2sqreultlem 27774 2sqreunnltlem 27777 axlowdimlem16 29535 unitdivcld 34533 zltp1ne 35900 poimirlem24 38562 itg2addnclem 38589 fzopredsuc 48393 iccpartiltu 48503 icceuelpartlem 48516 |
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