Description: Not equal and not larger implies smaller. (Contributed by Glauco Siliprandi, 11-Dec-2019)
Ref | Expression | ||
---|---|---|---|
Hypotheses | lttri5d.a | |
|
lttri5d.b | |
||
lttri5d.aneb | |
||
lttri5d.nlt | |
||
Assertion | lttri5d | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lttri5d.a | |
|
2 | lttri5d.b | |
|
3 | lttri5d.aneb | |
|
4 | lttri5d.nlt | |
|
5 | 1 | rexrd | |
6 | 2 | rexrd | |
7 | 5 6 3 4 | xrlttri5d | |