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| Mirrors > Home > ILE Home > Th. List > mulcomnq0 | Unicode version | ||
| Description: Multiplication of nonnegative fractions is commutative. (Contributed by Jim Kingdon, 27-Nov-2019.) |
| Ref | Expression |
|---|---|
| mulcomnq0 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-nq0 7756 |
. 2
| |
| 2 | oveq1 6065 |
. . 3
| |
| 3 | oveq2 6066 |
. . 3
| |
| 4 | 2, 3 | eqeq12d 2249 |
. 2
|
| 5 | oveq2 6066 |
. . 3
| |
| 6 | oveq1 6065 |
. . 3
| |
| 7 | 5, 6 | eqeq12d 2249 |
. 2
|
| 8 | nnmcom 6735 |
. . . . 5
| |
| 9 | 8 | ad2ant2r 509 |
. . . 4
|
| 10 | pinn 7640 |
. . . . . 6
| |
| 11 | pinn 7640 |
. . . . . 6
| |
| 12 | nnmcom 6735 |
. . . . . 6
| |
| 13 | 10, 11, 12 | syl2an 289 |
. . . . 5
|
| 14 | 13 | ad2ant2l 508 |
. . . 4
|
| 15 | opeq12 3890 |
. . . . 5
| |
| 16 | 15 | eceq1d 6816 |
. . . 4
|
| 17 | 9, 14, 16 | syl2anc 411 |
. . 3
|
| 18 | mulnnnq0 7781 |
. . 3
| |
| 19 | mulnnnq0 7781 |
. . . 4
| |
| 20 | 19 | ancoms 268 |
. . 3
|
| 21 | 17, 18, 20 | 3eqtr4d 2277 |
. 2
|
| 22 | 1, 4, 7, 21 | 2ecoptocl 6870 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4230 ax-sep 4233 ax-nul 4241 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-iinf 4715 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3046 df-csb 3142 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-nul 3513 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-iun 3998 df-br 4115 df-opab 4177 df-mpt 4178 df-tr 4214 df-id 4419 df-iord 4492 df-on 4494 df-suc 4497 df-iom 4718 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-ov 6061 df-oprab 6062 df-mpo 6063 df-1st 6347 df-2nd 6348 df-recs 6549 df-irdg 6614 df-oadd 6664 df-omul 6665 df-er 6780 df-ec 6782 df-qs 6786 df-ni 7635 df-mi 7637 df-enq0 7755 df-nq0 7756 df-mq0 7759 |
| This theorem is referenced by: distnq0r 7794 |
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