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| Mirrors > Home > MPE Home > Th. List > Mathboxes > decpmul | Structured version Visualization version GIF version | ||
| Description: Partial products algorithm for two digit multiplication. (Contributed by Steven Nguyen, 10-Dec-2022.) |
| Ref | Expression |
|---|---|
| decpmulnc.a | ⊢ 𝐴 ∈ ℕ0 |
| decpmulnc.b | ⊢ 𝐵 ∈ ℕ0 |
| decpmulnc.c | ⊢ 𝐶 ∈ ℕ0 |
| decpmulnc.d | ⊢ 𝐷 ∈ ℕ0 |
| decpmulnc.1 | ⊢ (𝐴 · 𝐶) = 𝐸 |
| decpmulnc.2 | ⊢ ((𝐴 · 𝐷) + (𝐵 · 𝐶)) = 𝐹 |
| decpmul.3 | ⊢ (𝐵 · 𝐷) = ;𝐺𝐻 |
| decpmul.4 | ⊢ (;𝐸𝐺 + 𝐹) = 𝐼 |
| decpmul.g | ⊢ 𝐺 ∈ ℕ0 |
| decpmul.h | ⊢ 𝐻 ∈ ℕ0 |
| Ref | Expression |
|---|---|
| decpmul | ⊢ (;𝐴𝐵 · ;𝐶𝐷) = ;𝐼𝐻 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | decpmulnc.a | . . 3 ⊢ 𝐴 ∈ ℕ0 | |
| 2 | decpmulnc.b | . . 3 ⊢ 𝐵 ∈ ℕ0 | |
| 3 | decpmulnc.c | . . 3 ⊢ 𝐶 ∈ ℕ0 | |
| 4 | decpmulnc.d | . . 3 ⊢ 𝐷 ∈ ℕ0 | |
| 5 | decpmulnc.1 | . . 3 ⊢ (𝐴 · 𝐶) = 𝐸 | |
| 6 | decpmulnc.2 | . . 3 ⊢ ((𝐴 · 𝐷) + (𝐵 · 𝐶)) = 𝐹 | |
| 7 | decpmul.3 | . . 3 ⊢ (𝐵 · 𝐷) = ;𝐺𝐻 | |
| 8 | 1, 2, 3, 4, 5, 6, 7 | decpmulnc 42651 | . 2 ⊢ (;𝐴𝐵 · ;𝐶𝐷) = ;;𝐸𝐹;𝐺𝐻 |
| 9 | dfdec10 12622 | . 2 ⊢ ;;𝐸𝐹;𝐺𝐻 = ((;10 · ;𝐸𝐹) + ;𝐺𝐻) | |
| 10 | 1, 3 | nn0mulcli 12451 | . . . . 5 ⊢ (𝐴 · 𝐶) ∈ ℕ0 |
| 11 | 5, 10 | eqeltrri 2834 | . . . 4 ⊢ 𝐸 ∈ ℕ0 |
| 12 | 2, 3 | nn0mulcli 12451 | . . . . . 6 ⊢ (𝐵 · 𝐶) ∈ ℕ0 |
| 13 | 1, 4, 12 | numcl 12632 | . . . . 5 ⊢ ((𝐴 · 𝐷) + (𝐵 · 𝐶)) ∈ ℕ0 |
| 14 | 6, 13 | eqeltrri 2834 | . . . 4 ⊢ 𝐹 ∈ ℕ0 |
| 15 | 11, 14 | deccl 12634 | . . 3 ⊢ ;𝐸𝐹 ∈ ℕ0 |
| 16 | 0nn0 12428 | . . 3 ⊢ 0 ∈ ℕ0 | |
| 17 | decpmul.g | . . 3 ⊢ 𝐺 ∈ ℕ0 | |
| 18 | decpmul.h | . . 3 ⊢ 𝐻 ∈ ℕ0 | |
| 19 | 15 | dec0u 12640 | . . 3 ⊢ (;10 · ;𝐸𝐹) = ;;𝐸𝐹0 |
| 20 | eqid 2737 | . . 3 ⊢ ;𝐺𝐻 = ;𝐺𝐻 | |
| 21 | 11, 14, 17 | decaddcom 42648 | . . . 4 ⊢ (;𝐸𝐹 + 𝐺) = (;𝐸𝐺 + 𝐹) |
| 22 | decpmul.4 | . . . 4 ⊢ (;𝐸𝐺 + 𝐹) = 𝐼 | |
| 23 | 21, 22 | eqtri 2760 | . . 3 ⊢ (;𝐸𝐹 + 𝐺) = 𝐼 |
| 24 | 18 | nn0cni 12425 | . . . 4 ⊢ 𝐻 ∈ ℂ |
| 25 | 24 | addlidi 11333 | . . 3 ⊢ (0 + 𝐻) = 𝐻 |
| 26 | 15, 16, 17, 18, 19, 20, 23, 25 | decadd 12673 | . 2 ⊢ ((;10 · ;𝐸𝐹) + ;𝐺𝐻) = ;𝐼𝐻 |
| 27 | 8, 9, 26 | 3eqtri 2764 | 1 ⊢ (;𝐴𝐵 · ;𝐶𝐷) = ;𝐼𝐻 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ∈ wcel 2114 (class class class)co 7368 0cc0 11038 1c1 11039 + caddc 11041 · cmul 11043 ℕ0cn0 12413 ;cdc 12619 |
| 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 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 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-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-pnf 11180 df-mnf 11181 df-ltxr 11183 df-sub 11378 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 df-n0 12414 df-dec 12620 |
| This theorem is referenced by: ex-decpmul 42670 |
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