|   | 1 |  initial version  | 
Sorry for the noise, I'm seeing the light -- I should have written
```
def ff(b): return(max([b, 1-b]))
show(plot(ff, (a, 0, 1)))
```
The other writing mixes symbolic rules with pure code. Best, O.
|   | 2 |  No.2 Revision  | 
Sorry for the noise, I'm seeing the light -- I should have written
```
```
The other writing mixes symbolic rules with pure code. Best, O.code.
 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.
 
                
                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.