1 | initial version |

Hi,

Never believe the symbolic ring as it can answer False when the result is True (hopefully a True is really True). To get the answer to your question, you would better do:

```
sage: QQbar(5).sqrt() in AA
True
```

Note: **QQbar** is the set of algebraic number and **AA** is the set of real algebraic numbers.

Vincent

2 | No.2 Revision |

Hi,

Never believe the symbolic ring as it can answer False when the result is True (hopefully a True is ~~really ~~real True). To get the answer to your question, you would better do:

```
sage: QQbar(5).sqrt() in AA
True
```

Note: **QQbar** is the set of algebraic number and **AA** is the set of real algebraic numbers.

Vincent

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