Description: Subtracting a positive real from another number decreases it. (Contributed by Mario Carneiro, 28-May-2016)
Ref | Expression | ||
---|---|---|---|
Hypotheses | rpgecld.1 | |
|
rpgecld.2 | |
||
Assertion | ltsubrpd | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rpgecld.1 | |
|
2 | rpgecld.2 | |
|
3 | ltsubrp | |
|
4 | 1 2 3 | syl2anc | |