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| Mirrors > Home > MPE Home > Th. List > Mathboxes > redivne0bd | Structured version Visualization version GIF version | ||
| Description: The ratio of nonzero numbers is nonzero. (Contributed by SN, 2-Apr-2026.) |
| Ref | Expression |
|---|---|
| redivcan2d.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| redivcan2d.b | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| redivcan2d.z | ⊢ (𝜑 → 𝐵 ≠ 0) |
| Ref | Expression |
|---|---|
| redivne0bd | ⊢ (𝜑 → (𝐴 ≠ 0 ↔ (𝐴 /ℝ 𝐵) ≠ 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | redivcan2d.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | redivcan2d.b | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | redivcan2d.z | . . . 4 ⊢ (𝜑 → 𝐵 ≠ 0) | |
| 4 | 1, 2, 3 | rediveq0d 43243 | . . 3 ⊢ (𝜑 → ((𝐴 /ℝ 𝐵) = 0 ↔ 𝐴 = 0)) |
| 5 | 4 | bicomd 226 | . 2 ⊢ (𝜑 → (𝐴 = 0 ↔ (𝐴 /ℝ 𝐵) = 0)) |
| 6 | 5 | necon3bid 3005 | 1 ⊢ (𝜑 → (𝐴 ≠ 0 ↔ (𝐴 /ℝ 𝐵) ≠ 0)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2146 ≠ wne 2961 (class class class)co 7423 ℝcr 11117 0cc0 11118 /ℝ crediv 43234 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-po 5574 df-so 5575 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11263 df-mnf 11264 df-ltxr 11266 df-2 12321 df-3 12322 df-resub 43160 df-rediv 43235 |
| This theorem is used by: rerecne0d 43250 |
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