Description: A symmetry with \/ .
See negsym1 for more information. (Contributed by Anthony Hart, 4-Sep-2011)
Ref | Expression | ||
---|---|---|---|
Assertion | dissym1 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orc | |
|
2 | falim | |
|
3 | 2 | orim2i | |
4 | 1 3 | jaoi | |