1 | initial version |

This is may not be a good answer explaining why is the `Symbolic Ring`

not working here, but at least a workaround: froget about symbolic functions and use Python lambda functions instead:

```
sage: plot3d(lambda x,y: abs(x+I*y),(x,-5,5),(y,-5,5))
```

2 | No.2 Revision |

This is may not be a good answer explaining why is the `Symbolic Ring`

not working here, but at least a workaround: ~~froget ~~forget about symbolic functions and use Python lambda functions instead:

`sage: plot3d(lambda x,y: `~~abs(x+I*y),(x,-5,5),(y,-5,5))
~~abs(x+I*y), (x,-5,5), (y,-5,5))

or even:

```
sage: plot3d(lambda x,y: abs(x+I*y), (x,-5,5), (y,-5,5), adaptive=True)
```

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