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| Mirrors > Home > ILE Home > Th. List > decmul2c | GIF version | ||
| Description: The product of a numeral with a number (with carry). (Contributed by Mario Carneiro, 18-Feb-2014.) (Revised by AV, 6-Sep-2021.) |
| Ref | Expression |
|---|---|
| decmul1.p | ⊢ 𝑃 ∈ ℕ0 |
| decmul1.a | ⊢ 𝐴 ∈ ℕ0 |
| decmul1.b | ⊢ 𝐵 ∈ ℕ0 |
| decmul1.n | ⊢ 𝑁 = ;𝐴𝐵 |
| decmul1.0 | ⊢ 𝐷 ∈ ℕ0 |
| decmul1c.e | ⊢ 𝐸 ∈ ℕ0 |
| decmul2c.c | ⊢ ((𝑃 · 𝐴) + 𝐸) = 𝐶 |
| decmul2c.2 | ⊢ (𝑃 · 𝐵) = ;𝐸𝐷 |
| Ref | Expression |
|---|---|
| decmul2c | ⊢ (𝑃 · 𝑁) = ;𝐶𝐷 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 10nn0 9729 | . . 3 ⊢ ;10 ∈ ℕ0 | |
| 2 | decmul1.p | . . 3 ⊢ 𝑃 ∈ ℕ0 | |
| 3 | decmul1.a | . . 3 ⊢ 𝐴 ∈ ℕ0 | |
| 4 | decmul1.b | . . 3 ⊢ 𝐵 ∈ ℕ0 | |
| 5 | decmul1.n | . . . 4 ⊢ 𝑁 = ;𝐴𝐵 | |
| 6 | dfdec10 9715 | . . . 4 ⊢ ;𝐴𝐵 = ((;10 · 𝐴) + 𝐵) | |
| 7 | 5, 6 | eqtri 2255 | . . 3 ⊢ 𝑁 = ((;10 · 𝐴) + 𝐵) |
| 8 | decmul1.0 | . . 3 ⊢ 𝐷 ∈ ℕ0 | |
| 9 | decmul1c.e | . . 3 ⊢ 𝐸 ∈ ℕ0 | |
| 10 | decmul2c.c | . . 3 ⊢ ((𝑃 · 𝐴) + 𝐸) = 𝐶 | |
| 11 | decmul2c.2 | . . . 4 ⊢ (𝑃 · 𝐵) = ;𝐸𝐷 | |
| 12 | dfdec10 9715 | . . . 4 ⊢ ;𝐸𝐷 = ((;10 · 𝐸) + 𝐷) | |
| 13 | 11, 12 | eqtri 2255 | . . 3 ⊢ (𝑃 · 𝐵) = ((;10 · 𝐸) + 𝐷) |
| 14 | 1, 2, 3, 4, 7, 8, 9, 10, 13 | nummul2c 9761 | . 2 ⊢ (𝑃 · 𝑁) = ((;10 · 𝐶) + 𝐷) |
| 15 | dfdec10 9715 | . 2 ⊢ ;𝐶𝐷 = ((;10 · 𝐶) + 𝐷) | |
| 16 | 14, 15 | eqtr4i 2258 | 1 ⊢ (𝑃 · 𝑁) = ;𝐶𝐷 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 ∈ wcel 2205 (class class class)co 6052 0cc0 8129 1c1 8130 + caddc 8132 · cmul 8134 ℕ0cn0 9498 ;cdc 9712 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-pow 4289 ax-pr 4324 ax-setind 4661 ax-cnex 8220 ax-resscn 8221 ax-1cn 8222 ax-1re 8223 ax-icn 8224 ax-addcl 8225 ax-addrcl 8226 ax-mulcl 8227 ax-addcom 8229 ax-mulcom 8230 ax-addass 8231 ax-mulass 8232 ax-distr 8233 ax-i2m1 8234 ax-1rid 8236 ax-0id 8237 ax-rnegex 8238 ax-cnre 8240 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3045 df-dif 3215 df-un 3217 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-int 3952 df-br 4112 df-opab 4174 df-id 4416 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-iota 5314 df-fun 5356 df-fv 5362 df-riota 6005 df-ov 6055 df-oprab 6056 df-mpo 6057 df-sub 8448 df-inn 9240 df-2 9298 df-3 9299 df-4 9300 df-5 9301 df-6 9302 df-7 9303 df-8 9304 df-9 9305 df-n0 9499 df-dec 9713 |
| This theorem is referenced by: decmulnc 9778 2exp8 13137 2exp16 13139 |
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