1 | initial version |

First of all, you missed a closing paranthesis on the first line. Secondly, it is better to include code that is working, that is to say include the line

```
sage: from sage.rings.qqbar import number_field_elements_from_algebraics
```

Now, if you want to convert a single element, just do

```
sage: K, elt, phi = r.as_number_field_element()
```

Then `elt`

is the element of your number field that is the same thing as `r`

. `phi`

is the morphism and you can check

```
sage: phi(elt) == r
True
```

2 | No.2 Revision |

First of all, you missed a closing paranthesis on the first line. Secondly, it is better to include code that is working, that is to say include the line

```
sage: from sage.rings.qqbar import number_field_elements_from_algebraics
```

Now, if you want to convert a single element, just do

```
sage: K, elt, phi = r.as_number_field_element()
```

Then `elt`

is the element of your number field ~~that ~~`K`

(that is the same thing as `r`

~~. ~~). `phi`

is the morphism from the number field `K`

to `QQbar`

and you can check

```
sage: phi(elt) == r
True
```

Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.