Description: Commuted version of itrere . (Contributed by SN, 27-Jun-2024)
Ref | Expression | ||
---|---|---|---|
Assertion | retire | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-rrecex | |
|
2 | sn-inelr | |
|
3 | simplll | |
|
4 | simplrl | |
|
5 | simplrr | |
|
6 | 3 4 5 | remulinvcom | |
7 | 6 | oveq1d | |
8 | 4 | recnd | |
9 | 3 | recnd | |
10 | ax-icn | |
|
11 | 10 | a1i | |
12 | 8 9 11 | mulassd | |
13 | sn-1ticom | |
|
14 | it1ei | |
|
15 | 13 14 | eqtri | |
16 | 15 | a1i | |
17 | 7 12 16 | 3eqtr3d | |
18 | simpr | |
|
19 | 4 18 | remulcld | |
20 | 17 19 | eqeltrrd | |
21 | 20 | ex | |
22 | 2 21 | mtoi | |
23 | 1 22 | rexlimddv | |
24 | 23 | ex | |
25 | 24 | necon4ad | |
26 | oveq1 | |
|
27 | sn-0tie0 | |
|
28 | 0re | |
|
29 | 27 28 | eqeltri | |
30 | 26 29 | eqeltrdi | |
31 | 25 30 | impbid1 | |