Description: Relationship between <_ and >_ using hypotheses. (Contributed by David A. Wheeler, 10-May-2015) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypotheses | gte-lteh.1 | |
|
gte-lteh.2 | |
||
Assertion | gte-lteh | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | gte-lteh.1 | |
|
2 | gte-lteh.2 | |
|
3 | df-gte | |
|
4 | 3 | breqi | |
5 | 1 2 | brcnv | |
6 | 4 5 | bitri | |