Description: Closure of the quotient function. (Contributed by Mario Carneiro, 26-Jul-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | quotcl2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | addcl | |
|
2 | 1 | adantl | |
3 | mulcl | |
|
4 | 3 | adantl | |
5 | reccl | |
|
6 | 5 | adantl | |
7 | neg1cn | |
|
8 | 7 | a1i | |
9 | plyssc | |
|
10 | simp1 | |
|
11 | 9 10 | sselid | |
12 | simp2 | |
|
13 | 9 12 | sselid | |
14 | simp3 | |
|
15 | 2 4 6 8 11 13 14 | quotcl | |