Description: An element of a closed interval is greater than its lower bound. (Contributed by Glauco Siliprandi, 11-Dec-2019)
Ref | Expression | ||
---|---|---|---|
Assertion | ioogtlb | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elioo2 | |
|
2 | simp2 | |
|
3 | 1 2 | syl6bi | |
4 | 3 | 3impia | |