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| Mirrors > Home > ILE Home > Th. List > mulcompig | Unicode version | ||
| Description: Multiplication of positive integers is commutative. (Contributed by Jim Kingdon, 26-Aug-2019.) |
| Ref | Expression |
|---|---|
| mulcompig |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pinn 7682 |
. . 3
| |
| 2 | pinn 7682 |
. . 3
| |
| 3 | nnmcom 6766 |
. . 3
| |
| 4 | 1, 2, 3 | syl2an 289 |
. 2
|
| 5 | mulpiord 7690 |
. 2
| |
| 6 | mulpiord 7690 |
. . 3
| |
| 7 | 6 | ancoms 268 |
. 2
|
| 8 | 4, 5, 7 | 3eqtr4d 2281 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4248 ax-sep 4251 ax-nul 4261 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-iinf 4737 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-br 4132 df-opab 4194 df-mpt 4195 df-tr 4232 df-id 4440 df-iord 4513 df-on 4515 df-suc 4518 df-iom 4740 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 df-iota 5340 df-fun 5382 df-fn 5383 df-f 5384 df-f1 5385 df-fo 5386 df-f1o 5387 df-fv 5388 df-ov 6091 df-oprab 6092 df-mpo 6093 df-1st 6378 df-2nd 6379 df-recs 6580 df-irdg 6645 df-oadd 6695 df-omul 6696 df-ni 7677 df-mi 7679 |
| This theorem is used by: dfplpq2 7727 enqbreq2 7730 enqer 7731 addcmpblnq 7740 mulcmpblnq 7741 ordpipqqs 7747 addcomnqg 7754 addassnqg 7755 mulcomnqg 7756 mulcanenq 7758 distrnqg 7760 mulidnq 7762 recexnq 7763 nqtri3or 7769 ltsonq 7771 ltanqg 7773 ltmnqg 7774 ltexnqq 7781 archnqq 7790 prarloclemarch2 7792 ltnnnq 7796 prarloclemlt 7866 |
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