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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 6386 | . . 3 ⊢ ∅ ∈ On | |
| 2 | nmulcom 36482 | . . 3 ⊢ ((𝐴 ∈ On ∧ ∅ ∈ On) → (𝐴 ·no ∅) = (∅ ·no 𝐴)) | |
| 3 | 1, 2 | mpan2 699 | . 2 ⊢ (𝐴 ∈ On → (𝐴 ·no ∅) = (∅ ·no 𝐴)) |
| 4 | nmulr0 36483 | . 2 ⊢ (𝐴 ∈ On → (𝐴 ·no ∅) = ∅) | |
| 5 | 3, 4 | eqtr3d 2789 | 1 ⊢ (𝐴 ∈ On → (∅ ·no 𝐴) = ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1550 ∈ wcel 2132 ∅c0 4276 Oncon0 6331 (class class class)co 7381 ·no cnmul 36475 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-8 2134 ax-9 2142 ax-10 2165 ax-11 2181 ax-12 2202 ax-ext 2724 ax-rep 5217 ax-sep 5236 ax-nul 5246 ax-pow 5312 ax-pr 5380 ax-un 7703 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3or 1096 df-3an 1097 df-tru 1553 df-fal 1563 df-ex 1790 df-nf 1794 df-sb 2081 df-mo 2556 df-eu 2586 df-clab 2731 df-cleq 2744 df-clel 2827 df-nfc 2901 df-ne 2948 df-ral 3067 df-rex 3077 df-reu 3358 df-rab 3405 df-v 3446 df-sbc 3736 df-csb 3844 df-dif 3898 df-un 3900 df-in 3902 df-ss 3912 df-pss 3915 df-nul 4277 df-if 4471 df-pw 4547 df-sn 4573 df-pr 4575 df-op 4579 df-uni 4856 df-int 4896 df-iun 4941 df-br 5091 df-opab 5153 df-mpt 5172 df-tr 5198 df-id 5531 df-eprel 5536 df-po 5544 df-so 5545 df-fr 5589 df-se 5590 df-we 5591 df-xp 5642 df-rel 5643 df-cnv 5644 df-co 5645 df-dm 5646 df-rn 5647 df-res 5648 df-ima 5649 df-pred 6273 df-ord 6334 df-on 6335 df-suc 6337 df-iota 6462 df-fun 6508 df-fn 6509 df-f 6510 df-f1 6511 df-fo 6512 df-f1o 6513 df-fv 6514 df-ov 7384 df-oprab 7385 df-mpo 7386 df-1st 7955 df-2nd 7956 df-frecs 8246 df-nadd 8620 df-nmul 36476 |
| This theorem is referenced by: (None) |
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