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Mirrors > Home > ILE Home > Th. List > lenltd | GIF version |
Description: 'Less than or equal to' in terms of 'less than'. (Contributed by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
ltd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
ltd.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
Ref | Expression |
---|---|
lenltd | ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ltd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
2 | ltd.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
3 | lenlt 7974 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
4 | 1, 2, 3 | syl2anc 409 | 1 ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 104 ∈ wcel 2136 class class class wbr 3982 ℝcr 7752 < clt 7933 ≤ cle 7934 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-v 2728 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-br 3983 df-opab 4044 df-xp 4610 df-cnv 4612 df-xr 7937 df-le 7939 |
This theorem is referenced by: ltnsymd 8018 nltled 8019 lensymd 8020 leadd1 8328 lemul1 8491 leltap 8523 ap0gt0 8538 prodgt0 8747 prodge0 8749 lediv1 8764 lemuldiv 8776 lerec 8779 lt2msq 8781 le2msq 8796 squeeze0 8799 suprleubex 8849 0mnnnnn0 9146 elnn0z 9204 uzm1 9496 infregelbex 9536 fztri3or 9974 fzdisj 9987 uzdisj 10028 nn0disj 10073 fzouzdisj 10115 elfzonelfzo 10165 flqeqceilz 10253 modifeq2int 10321 modsumfzodifsn 10331 nn0leexp2 10624 expcanlem 10628 fimaxq 10740 resqrexlemoverl 10963 leabs 11016 absle 11031 maxleast 11155 minmax 11171 climge0 11266 pcfac 12280 cxple 13487 |
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