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| Description: Ordinal multiplication with zero. Proposition 8.18(1) of [TakeutiZaring] p. 63. |
| Ref | Expression |
|---|---|
| om0r |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opreq2 4027 |
. . 3
| |
| 2 | 1 | eqeq1d 1526 |
. 2
|
| 3 | opreq2 4027 |
. . 3
| |
| 4 | 3 | eqeq1d 1526 |
. 2
|
| 5 | opreq2 4027 |
. . 3
| |
| 6 | 5 | eqeq1d 1526 |
. 2
|
| 7 | opreq2 4027 |
. . 3
| |
| 8 | 7 | eqeq1d 1526 |
. 2
|
| 9 | 0elon 3026 |
. . 3
| |
| 10 | om0 4292 |
. . 3
| |
| 11 | 9, 10 | ax-mp 7 |
. 2
|
| 12 | omsuc 4301 |
. . . . 5
| |
| 13 | 9, 12 | mpan 699 |
. . . 4
|
| 14 | oa0 4291 |
. . . . . . 7
| |
| 15 | 9, 14 | ax-mp 7 |
. . . . . 6
|
| 16 | 15 | eqcomi 1522 |
. . . . 5
|
| 17 | 16 | a1i 8 |
. . . 4
|
| 18 | 13, 17 | eqeq12d 1532 |
. . 3
|
| 19 | opreq1 4026 |
. . 3
| |
| 20 | 18, 19 | syl5bir 208 |
. 2
|
| 21 | visset 1859 |
. . . . 5
| |
| 22 | omlim 4304 |
. . . . . 6
| |
| 23 | 9, 22 | mpan 699 |
. . . . 5
|
| 24 | 21, 23 | mpan 699 |
. . . 4
|
| 25 | 24 | eqeq1d 1526 |
. . 3
|
| 26 | iuneq2 2646 |
. . . 4
| |
| 27 | iun0 2672 |
. . . 4
| |
| 28 | 26, 27 | syl6eq 1566 |
. . 3
|
| 29 | 25, 28 | syl5bir 208 |
. 2
|
| 30 | 2, 4, 6, 8, 11, 20, 29 | tfinds 3212 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: omord 4335 omwordi 4338 om00 4342 odi 4346 omass 4347 oeoa 4360 nnm0r 4368 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-9 1001 ax-10 1002 ax-11 1003 ax-12 1004 ax-13 1005 ax-14 1006 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 ax-rep 2767 ax-sep 2777 ax-nul 2784 ax-pow 2818 ax-pr 2855 ax-un 3089 |
| This theorem depends on definitions: df-bi 145 df-or 222 df-an 223 df-3or 782 df-3an 783 df-ex 1017 df-sb 1209 df-eu 1421 df-mo 1422 df-clab 1506 df-cleq 1511 df-clel 1514 df-ne 1630 df-ral 1695 df-rex 1696 df-rab 1698 df-v 1858 df-sbc 1987 df-csb 2052 df-dif 2101 df-un 2102 df-in 2103 df-ss 2105 df-nul 2333 df-if 2416 df-pw 2459 df-sn 2470 df-pr 2471 df-tp 2473 df-op 2474 df-uni 2570 df-iun 2635 df-br 2693 df-opab 2741 df-tr 2755 df-eprel 2910 df-id 2913 df-po 2918 df-so 2929 df-fr 2947 df-we 2962 df-ord 2978 df-on 2979 df-lim 2980 df-suc 2981 df-xp 3265 df-rel 3266 df-cnv 3267 df-co 3268 df-dm 3269 df-rn 3270 df-res 3271 df-ima 3272 df-fun 3273 df-fn 3274 df-fv 3279 df-opr 4023 df-oprab 4024 df-rdg 4233 df-oadd 4271 df-omul 4272 |