Description: 1 is less than 3. (Contributed by NM, 26-Sep-2010)
Ref | Expression | ||
---|---|---|---|
Assertion | 1lt3 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1lt2 | |
|
2 | 2lt3 | |
|
3 | 1re | |
|
4 | 2re | |
|
5 | 3re | |
|
6 | 3 4 5 | lttri | |
7 | 1 2 6 | mp2an | |