Description: 2 is less than 5. (Contributed by Mario Carneiro, 15-Sep-2013)
Ref | Expression | ||
---|---|---|---|
Assertion | 2lt5 | |- 2 < 5 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2lt4 | |- 2 < 4 |
|
2 | 4lt5 | |- 4 < 5 |
|
3 | 2re | |- 2 e. RR |
|
4 | 4re | |- 4 e. RR |
|
5 | 5re | |- 5 e. RR |
|
6 | 3 4 5 | lttri | |- ( ( 2 < 4 /\ 4 < 5 ) -> 2 < 5 ) |
7 | 1 2 6 | mp2an | |- 2 < 5 |