# Weak positivity

In SageMath one can ask if x.is_positive{}. But this is the definition of strickt positivity. What or the weak case (i.e. $x >=0$) ?

Weak positivity

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It is obvious that $x \geq 0$ if and only if it is not the case that $x<0$. So, we can write

```
not(x.is_negative())
```

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Asked: ** 2019-09-21 13:16:15 +0200 **

Seen: **537 times**

Last updated: **Oct 01 '19**

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