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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 8169 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | gt0ne0d.1 | . 2 ⊢ (𝜑 → 0 < 𝐴) | |
| 3 | ltne 8254 | . 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 2200 ≠ wne 2400 class class class wbr 4086 ℝcr 8021 0cc0 8022 < clt 8204 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-cnex 8113 ax-resscn 8114 ax-1re 8116 ax-addrcl 8119 ax-rnegex 8131 ax-pre-ltirr 8134 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-opab 4149 df-xp 4729 df-pnf 8206 df-mnf 8207 df-ltxr 8209 |
| This theorem is referenced by: sup3exmid 9127 modqval 10576 modqvalr 10577 modqcl 10578 flqpmodeq 10579 modq0 10581 modqge0 10584 modqlt 10585 modqdiffl 10587 modqdifz 10588 modqvalp1 10595 modqid 10601 modqcyc 10611 modqadd1 10613 modqmuladd 10618 modqmuladdnn0 10620 modqmul1 10629 modqdi 10644 modqsubdir 10645 ennnfonelemp1 13017 |
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