Metamath Proof Explorer
Description: Difference of absolute values. (Contributed by Paul Chapman, 7-Sep-2007)
|
|
Ref |
Expression |
|
Hypotheses |
abs2difi.1 |
|
|
|
abs2difi.2 |
|
|
Assertion |
abs2difi |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
abs2difi.1 |
|
2 |
|
abs2difi.2 |
|
3 |
|
abs2dif |
|
4 |
1 2 3
|
mp2an |
|