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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 42888 | . . 3 ⊢ (𝜑 → (𝐴 /ℝ 𝐶) = (℩𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴)) |
| 5 | 4 | eqeq1d 2739 | . 2 ⊢ (𝜑 → ((𝐴 /ℝ 𝐶) = 𝐵 ↔ (℩𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) = 𝐵)) |
| 6 | redivmuld.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 7 | 1, 2, 3 | rediveud 42889 | . . 3 ⊢ (𝜑 → ∃!𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) |
| 8 | oveq2 7368 | . . . . 5 ⊢ (𝑥 = 𝐵 → (𝐶 · 𝑥) = (𝐶 · 𝐵)) | |
| 9 | 8 | eqeq1d 2739 | . . . 4 ⊢ (𝑥 = 𝐵 → ((𝐶 · 𝑥) = 𝐴 ↔ (𝐶 · 𝐵) = 𝐴)) |
| 10 | 9 | riota2 7342 | . . 3 ⊢ ((𝐵 ∈ ℝ ∧ ∃!𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) → ((𝐶 · 𝐵) = 𝐴 ↔ (℩𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) = 𝐵)) |
| 11 | 6, 7, 10 | syl2anc 585 | . 2 ⊢ (𝜑 → ((𝐶 · 𝐵) = 𝐴 ↔ (℩𝑥 ∈ ℝ (𝐶 · 𝑥) = 𝐴) = 𝐵)) |
| 12 | 5, 11 | bitr4d 282 | 1 ⊢ (𝜑 → ((𝐴 /ℝ 𝐶) = 𝐵 ↔ (𝐶 · 𝐵) = 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ∃!wreu 3341 ℩crio 7316 (class class class)co 7360 ℝcr 11028 0cc0 11029 · cmul 11034 /ℝ crediv 42886 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-po 5532 df-so 5533 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-ltxr 11175 df-2 12235 df-3 12236 df-resub 42812 df-rediv 42887 |
| This theorem is referenced by: redivmul2d 42892 redivcan2d 42893 redivcan3d 42894 sn-rediv1d 42898 rerecrecd 42905 redivrec2d 42906 redivdird 42908 |
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