1 | initial version |

It seems implicit_plot is not happy about receiving a list of functions. You can do this:

```
F2=sum([implicit_plot(y^2 - x^2 -c ==0, (x,-5,5), (y,-5,5), color="blue" ) for c in [-5..5]])
```

which should work for the purpose of displaying or saving the plot.

2 | No.2 Revision |

It seems ~~implicit_plot ~~that `implicit_plot`

is not happy about receiving a list of functions.
You can do this:

```
F2=sum([implicit_plot(y^2 - x^2 -c ==0, (x,-5,5), (y,-5,5), color="blue" ) for c in [-5..5]])
```

which should work for the purpose of displaying or saving the plot.

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.