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| Mirrors > Home > ILE Home > Th. List > nnm0 | GIF version | ||
| Description: Multiplication with zero. Theorem 4J(A1) of [Enderton] p. 80. (Contributed by NM, 20-Sep-1995.) |
| Ref | Expression |
|---|---|
| nnm0 | ⊢ (𝐴 ∈ ω → (𝐴 ·o ∅) = ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnon 4703 | . 2 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
| 2 | om0 6617 | . 2 ⊢ (𝐴 ∈ On → (𝐴 ·o ∅) = ∅) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝐴 ∈ ω → (𝐴 ·o ∅) = ∅) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 ∅c0 3491 Oncon0 4455 ωcom 4683 (class class class)co 6010 ·o comu 6571 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4199 ax-sep 4202 ax-nul 4210 ax-pow 4259 ax-pr 4294 ax-un 4525 ax-setind 4630 ax-iinf 4681 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-iun 3967 df-br 4084 df-opab 4146 df-mpt 4147 df-tr 4183 df-id 4385 df-iord 4458 df-on 4460 df-suc 4463 df-iom 4684 df-xp 4726 df-rel 4727 df-cnv 4728 df-co 4729 df-dm 4730 df-rn 4731 df-res 4732 df-ima 4733 df-iota 5281 df-fun 5323 df-fn 5324 df-f 5325 df-f1 5326 df-fo 5327 df-f1o 5328 df-fv 5329 df-ov 6013 df-oprab 6014 df-mpo 6015 df-1st 6295 df-2nd 6296 df-recs 6462 df-irdg 6527 df-oadd 6577 df-omul 6578 |
| This theorem is referenced by: nnmcl 6640 nndi 6645 nnmass 6646 nnmsucr 6647 nnmcom 6648 nnm1 6684 nnm00 6689 enq0tr 7637 nq0m0r 7659 nq0a0 7660 |
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