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| Mirrors > Home > ILE Home > Th. List > lenlt | GIF version | ||
| Description: 'Less than or equal to' expressed in terms of 'less than'. Part of definition 11.2.7(vi) of [HoTT], p. (varies). (Contributed by NM, 13-May-1999.) |
| Ref | Expression |
|---|---|
| lenlt | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rexr 8224 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) | |
| 2 | rexr 8224 | . 2 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℝ*) | |
| 3 | xrlenlt 8243 | . 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 4 | 1, 2, 3 | syl2an 289 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2202 class class class wbr 4088 ℝcr 8030 ℝ*cxr 8212 < clt 8213 ≤ cle 8214 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-br 4089 df-opab 4151 df-xp 4731 df-cnv 4733 df-xr 8217 df-le 8219 |
| This theorem is referenced by: letri3 8259 ltleletr 8260 letr 8261 leid 8262 eqlelt 8265 ltle 8266 lelttr 8267 ltletr 8268 lenlti 8279 lenltd 8296 lemul1 8772 msqge0 8795 mulge0 8798 ltleap 8811 recgt0 9029 lediv1 9048 dfinfre 9135 nnge1 9165 nnnlt1 9168 avgle1 9384 avgle2 9385 nn0nlt0 9427 zltnle 9524 zleloe 9525 zdcle 9555 recnz 9572 btwnnz 9573 prime 9578 fznlem 10275 nelfzo 10386 fzonlt0 10403 qltnle 10502 bcval4 11013 ccatsymb 11178 swrd0g 11240 resqrexlemgt0 11580 climge0 11885 infpnlem1 12931 efle 15499 logleb 15598 cxple 15640 cxple3 15644 lgsval2lem 15738 lgsneg 15752 lgsdilem 15755 gausslemma2dlem1a 15786 gausslemma2dlem3 15791 supfz 16675 inffz 16676 |
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