Description: Addition to both sides of 'less than'. (Contributed by Mario Carneiro, 30-May-2016)
Ref | Expression | ||
---|---|---|---|
Hypotheses | ltd.1 | |
|
ltd.2 | |
||
letrd.3 | |
||
ltletrd.4 | |
||
Assertion | ltadd2dd | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ltd.1 | |
|
2 | ltd.2 | |
|
3 | letrd.3 | |
|
4 | ltletrd.4 | |
|
5 | 1 2 3 | ltadd2d | |
6 | 4 5 | mpbid | |