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Related theorems Unicode version |
| Description: Multiplication of positive integers is commutative. |
| Ref | Expression |
|---|---|
| mulcompi.1 |
|
| mulcompi.2 |
|
| Ref | Expression |
|---|---|
| mulcompi |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnmcom 4247 |
. . . 4
| |
| 2 | pinn 5018 |
. . . 4
| |
| 3 | pinn 5018 |
. . . 4
| |
| 4 | 1, 2, 3 | syl2an 456 |
. . 3
|
| 5 | mulpiord 5025 |
. . 3
| |
| 6 | mulpiord 5025 |
. . . 4
| |
| 7 | 6 | ancoms 438 |
. . 3
|
| 8 | 4, 5, 7 | 3eqtr4d 1520 |
. 2
|
| 9 | mulcompi.2 |
. . 3
| |
| 10 | dmmulpi 5031 |
. . 3
| |
| 11 | mulcompi.1 |
. . 3
| |
| 12 | 9, 10, 11 | ndmoprcom 4053 |
. 2
|
| 13 | 8, 12 | pm2.61i 126 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: dmenq 5057 enqer 5058 addcmpblnq 5064 mulcmpblnq 5065 ordpipq 5068 addcompq 5074 addasspq 5075 mulcompq 5076 distrpqlem 5078 distrpq 5079 mulidpq 5081 recmulpq 5082 ltsopq 5087 ltapq 5088 ltmpq 5089 ltexpq 5092 halfpq 5094 prlem934b 5150 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-9 967 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-rep 2698 ax-sep 2708 ax-nul 2715 ax-pow 2748 ax-pr 2785 ax-un 2872 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 778 df-3an 779 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-ral 1652 df-rex 1653 df-reu 1654 df-rab 1655 df-v 1815 df-sbc 1945 df-csb 2005 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-if 2366 df-pw 2406 df-sn 2416 df-pr 2417 df-tp 2419 df-op 2420 df-uni 2508 df-int 2538 df-iun 2572 df-br 2625 df-opab 2672 df-tr 2686 df-eprel 2838 df-id 2841 df-po 2846 df-so 2856 df-fr 2923 df-we 2940 df-ord 2957 df-on 2958 df-lim 2959 df-suc 2960 df-om 3138 df-xp 3190 df-rel 3191 df-cnv 3192 df-co 3193 df-dm 3194 df-rn 3195 df-res 3196 df-ima 3197 df-fun 3198 df-fn 3199 df-f 3200 df-fv 3204 df-rdg 3938 df-opr 3971 df-oprab 3972 df-1st 4085 df-2nd 4086 df-oadd 4141 df-omul 4142 df-ni 5012 df-mi 5014 |