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| Mirrors > Home > ILE Home > Th. List > recclnq | Unicode version | ||
| Description: Closure law for positive fraction reciprocal. (Contributed by NM, 6-Mar-1996.) (Revised by Mario Carneiro, 8-May-2013.) | 
| Ref | Expression | 
|---|---|
| recclnq | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | recexnq 7457 | 
. 2
 | |
| 2 | recmulnqg 7458 | 
. . . . . 6
 | |
| 3 | 2 | biimpar 297 | 
. . . . 5
 | 
| 4 | eleq1a 2268 | 
. . . . . 6
 | |
| 5 | 4 | ad2antlr 489 | 
. . . . 5
 | 
| 6 | 3, 5 | mpd 13 | 
. . . 4
 | 
| 7 | 6 | expl 378 | 
. . 3
 | 
| 8 | 7 | exlimdv 1833 | 
. 2
 | 
| 9 | 1, 8 | mpd 13 | 
1
 | 
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