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Mirrors > Home > ILE Home > Th. List > nnmass | Unicode version |
Description: Multiplication of natural numbers is associative. Theorem 4K(4) of [Enderton] p. 81. (Contributed by NM, 20-Sep-1995.) (Revised by Mario Carneiro, 15-Nov-2014.) |
Ref | Expression |
---|---|
nnmass |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq2 5782 | . . . . . 6 | |
2 | oveq2 5782 | . . . . . . 7 | |
3 | 2 | oveq2d 5790 | . . . . . 6 |
4 | 1, 3 | eqeq12d 2154 | . . . . 5 |
5 | 4 | imbi2d 229 | . . . 4 |
6 | oveq2 5782 | . . . . . 6 | |
7 | oveq2 5782 | . . . . . . 7 | |
8 | 7 | oveq2d 5790 | . . . . . 6 |
9 | 6, 8 | eqeq12d 2154 | . . . . 5 |
10 | oveq2 5782 | . . . . . 6 | |
11 | oveq2 5782 | . . . . . . 7 | |
12 | 11 | oveq2d 5790 | . . . . . 6 |
13 | 10, 12 | eqeq12d 2154 | . . . . 5 |
14 | oveq2 5782 | . . . . . 6 | |
15 | oveq2 5782 | . . . . . . 7 | |
16 | 15 | oveq2d 5790 | . . . . . 6 |
17 | 14, 16 | eqeq12d 2154 | . . . . 5 |
18 | nnmcl 6377 | . . . . . . 7 | |
19 | nnm0 6371 | . . . . . . 7 | |
20 | 18, 19 | syl 14 | . . . . . 6 |
21 | nnm0 6371 | . . . . . . . 8 | |
22 | 21 | oveq2d 5790 | . . . . . . 7 |
23 | nnm0 6371 | . . . . . . 7 | |
24 | 22, 23 | sylan9eqr 2194 | . . . . . 6 |
25 | 20, 24 | eqtr4d 2175 | . . . . 5 |
26 | oveq1 5781 | . . . . . . . . 9 | |
27 | nnmsuc 6373 | . . . . . . . . . . . 12 | |
28 | 18, 27 | sylan 281 | . . . . . . . . . . 11 |
29 | 28 | 3impa 1176 | . . . . . . . . . 10 |
30 | nnmsuc 6373 | . . . . . . . . . . . . 13 | |
31 | 30 | 3adant1 999 | . . . . . . . . . . . 12 |
32 | 31 | oveq2d 5790 | . . . . . . . . . . 11 |
33 | nnmcl 6377 | . . . . . . . . . . . . . . . . 17 | |
34 | nndi 6382 | . . . . . . . . . . . . . . . . 17 | |
35 | 33, 34 | syl3an2 1250 | . . . . . . . . . . . . . . . 16 |
36 | 35 | 3exp 1180 | . . . . . . . . . . . . . . 15 |
37 | 36 | expd 256 | . . . . . . . . . . . . . 14 |
38 | 37 | com34 83 | . . . . . . . . . . . . 13 |
39 | 38 | pm2.43d 50 | . . . . . . . . . . . 12 |
40 | 39 | 3imp 1175 | . . . . . . . . . . 11 |
41 | 32, 40 | eqtrd 2172 | . . . . . . . . . 10 |
42 | 29, 41 | eqeq12d 2154 | . . . . . . . . 9 |
43 | 26, 42 | syl5ibr 155 | . . . . . . . 8 |
44 | 43 | 3exp 1180 | . . . . . . 7 |
45 | 44 | com3r 79 | . . . . . 6 |
46 | 45 | impd 252 | . . . . 5 |
47 | 9, 13, 17, 25, 46 | finds2 4515 | . . . 4 |
48 | 5, 47 | vtoclga 2752 | . . 3 |
49 | 48 | expdcom 1418 | . 2 |
50 | 49 | 3imp 1175 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 w3a 962 wceq 1331 wcel 1480 c0 3363 csuc 4287 com 4504 (class class class)co 5774 coa 6310 comu 6311 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-coll 4043 ax-sep 4046 ax-nul 4054 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-setind 4452 ax-iinf 4502 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-ral 2421 df-rex 2422 df-reu 2423 df-rab 2425 df-v 2688 df-sbc 2910 df-csb 3004 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-nul 3364 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-iun 3815 df-br 3930 df-opab 3990 df-mpt 3991 df-tr 4027 df-id 4215 df-iord 4288 df-on 4290 df-suc 4293 df-iom 4505 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-rn 4550 df-res 4551 df-ima 4552 df-iota 5088 df-fun 5125 df-fn 5126 df-f 5127 df-f1 5128 df-fo 5129 df-f1o 5130 df-fv 5131 df-ov 5777 df-oprab 5778 df-mpo 5779 df-1st 6038 df-2nd 6039 df-recs 6202 df-irdg 6267 df-oadd 6317 df-omul 6318 |
This theorem is referenced by: mulasspig 7140 enq0tr 7242 addcmpblnq0 7251 mulcmpblnq0 7252 mulcanenq0ec 7253 distrnq0 7267 addassnq0 7270 |
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