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Mirrors > Home > ILE Home > Th. List > addcomnqg | Unicode version |
Description: Addition of positive fractions is commutative. (Contributed by Jim Kingdon, 15-Sep-2019.) |
Ref | Expression |
---|---|
addcomnqg |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-nqqs 7289 | . 2 | |
2 | addpipqqs 7311 | . 2 | |
3 | addpipqqs 7311 | . 2 | |
4 | mulcompig 7272 | . . . . 5 | |
5 | mulcompig 7272 | . . . . 5 | |
6 | 4, 5 | oveqan12d 5861 | . . . 4 |
7 | 6 | an42s 579 | . . 3 |
8 | mulclpi 7269 | . . . . . 6 | |
9 | 8 | ancoms 266 | . . . . 5 |
10 | 9 | ad2ant2rl 503 | . . . 4 |
11 | mulclpi 7269 | . . . . . 6 | |
12 | 11 | ancoms 266 | . . . . 5 |
13 | 12 | ad2ant2lr 502 | . . . 4 |
14 | addcompig 7270 | . . . 4 | |
15 | 10, 13, 14 | syl2anc 409 | . . 3 |
16 | 7, 15 | eqtrd 2198 | . 2 |
17 | mulcompig 7272 | . . 3 | |
18 | 17 | ad2ant2l 500 | . 2 |
19 | 1, 2, 3, 16, 18 | ecovicom 6609 | 1 |
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