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| Mirrors > Home > ILE Home > Th. List > gt0ne0d | GIF version | ||
| Description: Positive implies nonzero. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| gt0ne0d.1 | ⊢ (𝜑 → 0 < 𝐴) |
| Ref | Expression |
|---|---|
| gt0ne0d | ⊢ (𝜑 → 𝐴 ≠ 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 8274 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | gt0ne0d.1 | . 2 ⊢ (𝜑 → 0 < 𝐴) | |
| 3 | ltne 8358 | . 2 ⊢ ((0 ∈ ℝ ∧ 0 < 𝐴) → 𝐴 ≠ 0) | |
| 4 | 1, 2, 3 | sylancr 414 | 1 ⊢ (𝜑 → 𝐴 ≠ 0) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2203 ≠ wne 2412 class class class wbr 4109 ℝcr 8126 0cc0 8127 < clt 8308 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-un 4554 ax-setind 4659 ax-cnex 8218 ax-resscn 8219 ax-1re 8221 ax-addrcl 8224 ax-rnegex 8236 ax-pre-ltirr 8239 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2815 df-dif 3213 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-br 4110 df-opab 4172 df-xp 4755 df-pnf 8310 df-mnf 8311 df-ltxr 8313 |
| This theorem is referenced by: sup3exmid 9231 modqval 10686 modqvalr 10687 modqcl 10688 flqpmodeq 10689 modq0 10691 modqge0 10694 modqlt 10695 modqdiffl 10697 modqdifz 10698 modqvalp1 10705 modqid 10711 modqcyc 10721 modqadd1 10723 modqmuladd 10728 modqmuladdnn0 10730 modqmul1 10739 modqdi 10754 modqsubdir 10755 ennnfonelemp1 13157 |
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