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| Mirrors > Home > MPE Home > Th. List > Mathboxes > nmull0 | Structured version Visualization version GIF version | ||
| Description: Natural multiplication by zero. (Contributed by Scott Fenton, 10-Jun-2026.) |
| Ref | Expression |
|---|---|
| nmull0 | ⊢ (𝐴 ∈ On → (∅ ·no 𝐴) = ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0elon 6420 | . . 3 ⊢ ∅ ∈ On | |
| 2 | nmulcom 36644 | . . 3 ⊢ ((𝐴 ∈ On ∧ ∅ ∈ On) → (𝐴 ·no ∅) = (∅ ·no 𝐴)) | |
| 3 | 1, 2 | mpan2 703 | . 2 ⊢ (𝐴 ∈ On → (𝐴 ·no ∅) = (∅ ·no 𝐴)) |
| 4 | nmulr0 36645 | . 2 ⊢ (𝐴 ∈ On → (𝐴 ·no ∅) = ∅) | |
| 5 | 3, 4 | eqtr3d 2807 | 1 ⊢ (𝐴 ∈ On → (∅ ·no 𝐴) = ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1568 ∈ wcel 2150 ∅c0 4294 Oncon0 6364 (class class class)co 7414 ·no cnmul 36637 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5340 ax-pr 5408 ax-un 7736 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-eu 2604 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ne 2966 df-ral 3087 df-rex 3097 df-reu 3377 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-int 4918 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5560 df-eprel 5565 df-po 5573 df-so 5574 df-fr 5618 df-se 5619 df-we 5620 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6306 df-ord 6367 df-on 6368 df-suc 6370 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-ov 7417 df-oprab 7418 df-mpo 7419 df-1st 7989 df-2nd 7990 df-frecs 8281 df-nadd 8655 df-nmul 36638 |
| This theorem is referenced by: (None) |
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