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| Mirrors > Home > MPE Home > Th. List > Mathboxes > redivmuld | Structured version Visualization version GIF version | ||
| Description: Relationship between division and multiplication. (Contributed by SN, 25-Nov-2025.) |
| Ref | Expression |
|---|---|
| redivmuld.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| redivmuld.b | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| redivmuld.c | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| redivmuld.z | ⊢ (𝜑 → 𝐶 ≠ 0) |
| Ref | Expression |
|---|---|
| redivmuld | ⊢ (𝜑 → ((𝐴 /ℝ 𝐶) = 𝐵 ↔ (𝐶 · 𝐵) = 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | redivmuld.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | redivmuld.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 3 | redivmuld.z | . . . 4 ⊢ (𝜑 → 𝐶 ≠ 0) | |
| 4 | 1, 2, 3 | redivvald 43261 | . . 3 ⊢ (𝜑 → (𝐴 /ℝ 𝐶) = (℩𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴)) |
| 5 | 4 | eqeq1d 2767 | . 2 ⊢ (𝜑 → ((𝐴 /ℝ 𝐶) = 𝐵 ↔ (℩𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) = 𝐵)) |
| 6 | redivmuld.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 7 | 1, 2, 3 | rediveud 43262 | . . 3 ⊢ (𝜑 → ∃!𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) |
| 8 | oveq2 7427 | . . . . 5 ⊢ (𝑥 = 𝐵 → (𝐶 · 𝑥) = (𝐶 · 𝐵)) | |
| 9 | 8 | eqeq1d 2767 | . . . 4 ⊢ (𝑥 = 𝐵 → ((𝐶 · 𝑥) = 𝐴 ↔ (𝐶 · 𝐵) = 𝐴)) |
| 10 | 9 | riota2 7401 | . . 3 ⊢ ((𝐵 ∈ ℝ ∧ ∃!𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) → ((𝐶 · 𝐵) = 𝐴 ↔ (℩𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) = 𝐵)) |
| 11 | 6, 7, 10 | syl2anc 596 | . 2 ⊢ (𝜑 → ((𝐶 · 𝐵) = 𝐴 ↔ (℩𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) = 𝐵)) |
| 12 | 5, 11 | bitr4d 285 | 1 ⊢ (𝜑 → ((𝐴 /ℝ 𝐶) = 𝐵 ↔ (𝐶 · 𝐵) = 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2146 ≠ wne 2960 ∃!wreu 3369 ℩crio 7375 (class class class)co 7419 ℝcr 11114 0cc0 11115 · cmul 11120 /ℝ crediv 43259 |
| 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 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-resscn 11172 ax-1cn 11173 ax-icn 11174 ax-addcl 11175 ax-addrcl 11176 ax-mulcl 11177 ax-mulrcl 11178 ax-addass 11180 ax-mulass 11181 ax-distr 11182 ax-i2m1 11183 ax-1ne0 11184 ax-1rid 11185 ax-rnegex 11186 ax-rrecex 11187 ax-cnre 11188 ax-pre-lttri 11189 ax-pre-lttrn 11190 ax-pre-ltadd 11191 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-pnf 11260 df-mnf 11261 df-ltxr 11263 df-2 12318 df-3 12319 df-resub 43185 df-rediv 43260 |
| This theorem is used by: redivmul2d 43265 redivcan2d 43266 redivcan3d 43267 sn-rediv1d 43271 rerecrecd 43278 redivrec2d 43279 redivdird 43281 |
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