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| Description: Multiplication with successor. Exercise 16 of [Enderton] p. 82. (The proof was shortened by Andrew Salmon, 22-Oct-2011.) |
| Ref | Expression |
|---|---|
| nnmsucr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opreq2 4890 |
. . . . 5
| |
| 2 | opreq2 4890 |
. . . . . 6
| |
| 3 | id 73 |
. . . . . 6
| |
| 4 | 2, 3 | opreq12d 4900 |
. . . . 5
|
| 5 | 1, 4 | eqeq12d 1899 |
. . . 4
|
| 6 | 5 | imbi2d 674 |
. . 3
|
| 7 | opreq2 4890 |
. . . . 5
| |
| 8 | opreq2 4890 |
. . . . . 6
| |
| 9 | id 73 |
. . . . . 6
| |
| 10 | 8, 9 | opreq12d 4900 |
. . . . 5
|
| 11 | 7, 10 | eqeq12d 1899 |
. . . 4
|
| 12 | opreq2 4890 |
. . . . 5
| |
| 13 | opreq2 4890 |
. . . . . 6
| |
| 14 | id 73 |
. . . . . 6
| |
| 15 | 13, 14 | opreq12d 4900 |
. . . . 5
|
| 16 | 12, 15 | eqeq12d 1899 |
. . . 4
|
| 17 | opreq2 4890 |
. . . . 5
| |
| 18 | opreq2 4890 |
. . . . . 6
| |
| 19 | id 73 |
. . . . . 6
| |
| 20 | 18, 19 | opreq12d 4900 |
. . . . 5
|
| 21 | 17, 20 | eqeq12d 1899 |
. . . 4
|
| 22 | nnm0 5276 |
. . . . 5
| |
| 23 | peano1 3971 |
. . . . . . 7
| |
| 24 | nnmcl 5283 |
. . . . . . 7
| |
| 25 | 23, 24 | mpan2 760 |
. . . . . 6
|
| 26 | nna0 5275 |
. . . . . 6
| |
| 27 | 25, 26 | syl 12 |
. . . . 5
|
| 28 | peano2 3972 |
. . . . . 6
| |
| 29 | nnm0 5276 |
. . . . . 6
| |
| 30 | 28, 29 | syl 12 |
. . . . 5
|
| 31 | 22, 27, 30 | 3eqtr4rd 1939 |
. . . 4
|
| 32 | nnmsuc 5278 |
. . . . . . . 8
| |
| 33 | peano2b 3968 |
. . . . . . . 8
| |
| 34 | 32, 33 | sylanb 498 |
. . . . . . 7
|
| 35 | nnmsuc 5278 |
. . . . . . . . 9
| |
| 36 | 35 | opreq1d 4897 |
. . . . . . . 8
|
| 37 | nnacom 5288 |
. . . . . . . . . . . 12
| |
| 38 | suceq 3729 |
. . . . . . . . . . . 12
| |
| 39 | 37, 38 | syl 12 |
. . . . . . . . . . 11
|
| 40 | nnasuc 5277 |
. . . . . . . . . . 11
| |
| 41 | nnasuc 5277 |
. . . . . . . . . . . 12
| |
| 42 | 41 | ancoms 484 |
. . . . . . . . . . 11
|
| 43 | 39, 40, 42 | 3eqtr4d 1937 |
. . . . . . . . . 10
|
| 44 | 43 | opreq2d 4898 |
. . . . . . . . 9
|
| 45 | nnaass 5292 |
. . . . . . . . . . . . 13
| |
| 46 | peano2b 3968 |
. . . . . . . . . . . . 13
| |
| 47 | 45, 46 | syl3an3b 1135 |
. . . . . . . . . . . 12
|
| 48 | nnmcl 5283 |
. . . . . . . . . . . 12
| |
| 49 | 47, 48 | syl3an1 1130 |
. . . . . . . . . . 11
|
| 50 | 49 | 3expb 1068 |
. . . . . . . . . 10
|
| 51 | 50 | anidms 480 |
. . . . . . . . 9
|
| 52 | nnaass 5292 |
. . . . . . . . . . . . . 14
| |
| 53 | 52, 33 | syl3an3b 1135 |
. . . . . . . . . . . . 13
|
| 54 | 53, 48 | syl3an1 1130 |
. . . . . . . . . . . 12
|
| 55 | 54 | 3expb 1068 |
. . . . . . . . . . 11
|
| 56 | 55 | an42s 567 |
. . . . . . . . . 10
|
| 57 | 56 | anidms 480 |
. . . . . . . . 9
|
| 58 | 44, 51, 57 | 3eqtr4d 1937 |
. . . . . . . 8
|
| 59 | 36, 58 | eqtrd 1925 |
. . . . . . 7
|
| 60 | 34, 59 | eqeq12d 1899 |
. . . . . 6
|
| 61 | opreq1 4889 |
. . . . . 6
| |
| 62 | 60, 61 | syl5bir 227 |
. . . . 5
|
| 63 | 62 | expcom 403 |
. . . 4
|
| 64 | 11, 16, 21, 31, 63 | finds2 3981 |
. . 3
|
| 65 | 6, 64 | vtoclga 2352 |
. 2
|
| 66 | 65 | impcom 378 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: nnmcom 5297 nnmcomOLD 5298 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-rep 3428 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-3or 859 df-3an 860 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-ral 2109 df-rex 2110 df-reu 2111 df-rab 2112 df-v 2294 df-sbc 2454 df-csb 2541 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-pss 2607 df-nul 2876 df-if 2983 df-pw 3035 df-sn 3049 df-pr 3050 df-tp 3052 df-op 3053 df-uni 3178 df-int 3215 df-iun 3257 df-br 3339 df-opab 3396 df-tr 3412 df-eprel 3583 df-id 3586 df-po 3591 df-so 3604 df-fr 3625 df-we 3644 df-ord 3660 df-on 3661 df-lim 3662 df-suc 3663 df-om 3950 df-xp 4000 df-rel 4001 df-cnv 4002 df-co 4003 df-dm 4004 df-rn 4005 df-res 4006 df-ima 4007 df-fun 4008 df-fn 4009 df-fv 4014 df-opr 4886 df-oprab 4887 df-rdg 5140 df-oadd 5179 df-omul 5180 |