Description: The square function on nonnegative reals is monotonic. (Contributed by NM, 2-Aug-1999)
Ref | Expression | ||
---|---|---|---|
Hypotheses | ltplus1.1 | |
|
prodgt0.2 | |
||
Assertion | le2msqi | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ltplus1.1 | |
|
2 | prodgt0.2 | |
|
3 | le2msq | |
|
4 | 2 3 | mpanr1 | |
5 | 1 4 | mpanl1 | |