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| Mirrors > Home > MPE Home > Th. List > Mathboxes > rerecidd | Structured version Visualization version GIF version | ||
| Description: Multiplication of a number and its reciprocal. (Contributed by SN, 25-Nov-2025.) |
| Ref | Expression |
|---|---|
| sn-rereccld.a | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| sn-rereccld.z | ⊢ (𝜑 → 𝐴 ≠ 0) |
| Ref | Expression |
|---|---|
| rerecidd | ⊢ (𝜑 → (𝐴 · (1 /ℝ 𝐴)) = 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1red 11145 | . 2 ⊢ (𝜑 → 1 ∈ ℝ) | |
| 2 | sn-rereccld.a | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 3 | sn-rereccld.z | . 2 ⊢ (𝜑 → 𝐴 ≠ 0) | |
| 4 | 1, 2, 3 | redivcan2d 42879 | 1 ⊢ (𝜑 → (𝐴 · (1 /ℝ 𝐴)) = 1) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 (class class class)co 7367 ℝcr 11037 0cc0 11038 1c1 11039 · cmul 11043 /ℝ crediv 42872 |
| 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 5232 ax-nul 5242 ax-pow 5308 ax-pr 5376 ax-un 7689 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 |
| 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 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6455 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-ltxr 11184 df-2 12244 df-3 12245 df-resub 42798 df-rediv 42873 |
| This theorem is referenced by: rerecid2d 42890 redivrec2d 42892 sn-recgt0d 42922 mulgt0b2d 42923 sn-itrere 42933 |
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