1 | initial version |

There is certainly something wrong with `density_plot`

. Without exploring further, you can define `f12`

as follows:

```
def f12(a, b):
if a - b < 0:
return RDF(f1(a, b))
else:
return RDF(f2(a, b))
```

This seems to work.

2 | No.2 Revision |

There is certainly something wrong with `density_plot`

~~. ~~ here, thanks for reporting. Without exploring further, you can define `f12`

as follows:

```
def f12(a, b):
if a - b < 0:
return RDF(f1(a, b))
else:
return RDF(f2(a, b))
```

This seems to work.

3 | No.3 Revision |

There is certainly something wrong with `density_plot`

here, thanks for reporting. Without exploring further, you can define `f12`

as follows:

```
def f12(a, b):
if a - b < 0:
return RDF(f1(a, b))
else:
return RDF(f2(a, b))
```

This seems to work.

The problem is reported as trac ticket 17684.

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