Description: Closure of the multiplicative inverse in a division ring. ( reccl analog). (Contributed by NM, 19-Apr-2014)
Ref | Expression | ||
---|---|---|---|
Hypotheses | invrcl.b | |
|
invrcl.z | |
||
invrcl.i | |
||
Assertion | drnginvrcl | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | invrcl.b | |
|
2 | invrcl.z | |
|
3 | invrcl.i | |
|
4 | eqid | |
|
5 | 1 4 2 | drngunit | |
6 | drngring | |
|
7 | 4 3 1 | ringinvcl | |
8 | 7 | ex | |
9 | 6 8 | syl | |
10 | 5 9 | sylbird | |
11 | 10 | 3impib | |