Michi’s blog » Progress

## Progress

• September 26th, 2007
• 4:25 am
dynkin:~/magma> magma
Magma V2.14-D250907   Wed Sep 26 2007 13:19:51 on dynkin   [Seed = 1]
Type ? for help.  Type -D to quit.

> Attach("homotopy.m");
> Attach("assoc.m");
> Aoo := ConstructAooRecord(DihedralGroup(4),10);
> S := CohomologyRingQuotient(AooR);
> CalculateHighProduct(Aoo,[x,y,x,y]);
z
> exit;
Total time: 203.039 seconds, Total memory usage: 146.18MB
`

And this is one major reason for the lack of updates recently.

### 2 People had this to say...

• Heinrich Hartmann
• March 18th, 2012
• 14:38

That looks great!

Did you publish your source code somewhere?

It would be great to have a working A_infinity library (preferably in python) somewhere which allows you to do computations, like homological preturbation. I saw something on Paul Seidels homepage, but this is seems to be more like private hack.

Best, Heinrich

• Michi
• March 22nd, 2012
• 7:22

Well, the example above is working (for some cases) in the Computer Algebra System Magma, where my A-infinity code is included in the distribution.