Activity
From 07 May 2016 to 05 Jun 2016
10 May 2016
- 16:41 Feature #883: gin: return/print a suitable change of variables
- How about a new fn which computes both gin and a "simple" suitable transformation?
Or maybe a fn which takes an idea... - 16:30 Feature #883: gin: return/print a suitable change of variables
- John Abbott wrote:
> Werner also asked whether the transformation used is triangular or square.
triangular (auxil... - 15:28 Feature #883 (In Progress): gin: return/print a suitable change of variables
- Werner also asked whether the transformation used is triangular or square.
It might be nice to have the option to ... - 13:54 Feature #883: gin: return/print a suitable change of variables
- John Abbott wrote:
> Werner Seiler asks whether it would be possible to make @gin@ also produce a "good" linear chan... - 11:11 Feature #883 (Closed): gin: return/print a suitable change of variables
- Werner Seiler asks whether it would be possible to make @gin@ also produce a "good" linear change of variables (ideal...
- 14:02 Feature #877: Easier syntax to make a PRINCIPAL ideal?
- John Abbott wrote:
> Perhaps the error message should say which signatures @ideal@ does offer?
Yes, I like that (...
09 May 2016
- 15:56 Bug #880 (Closed): subst should check that indet is in same ring as 1st arg, but does not.
- @subst@ should check that indet is in same ring as 1st arg, but does not.
Here is an example:... - 15:30 Support #879: LOGAR: make CoCoA-5 easier to use
- At some point I triggered a bug in CoCoA-5. I was trying to use @subst@ somehow (to replace @a[6]@ by zero); perhaps...
- 15:25 Support #879: LOGAR: make CoCoA-5 easier to use
- Sandro then wanted to compute the expressions for the coordinates of the intersection points of the line and the elli...
- 15:16 Support #879: LOGAR: make CoCoA-5 easier to use
- @cond1@ corresponds to the condition that the ellipse passes through the origin.
It simplifies to @a[6]=0@.
We woul... - 15:10 Support #879: LOGAR: make CoCoA-5 easier to use
- ...
- 15:05 Support #879 (New): LOGAR: make CoCoA-5 easier to use
- In early May 2016 I met (Sandro) Logar at the Normaliz workshop in Osnabrueck.
I wanted to persuade him to use CoCoA... - 14:51 Feature #877 (In Progress): Easier syntax to make a PRINCIPAL ideal?
- Now I recall what I tried: @ideal(R,x)@ does not work; it says it wants a list instead of a RINGELEM.
Are there an... - 11:43 Feature #877: Easier syntax to make a PRINCIPAL ideal?
- It is already done, both in CoCoA-5 and CoCoALib (in CoCoALib up to 4 generators).
- 11:11 Feature #877 (Closed): Easier syntax to make a PRINCIPAL ideal?
- Currently the way to make a principal ideal is not so natural: the generator must be put into a list.
Are there an... - 11:29 Bug #878: RingElem applied to a symbol (repr as a string)
- Personally I find the situation described quite confusing.
It is not clear to me why @ReadExpr@ is not already inc... - 11:25 Bug #878 (Closed): RingElem applied to a symbol (repr as a string)
- The current design for converting a symbol (repr as a string) into a RINGELEM is inconvenient.
I wanted to do this...
07 May 2016
- 13:59 Feature #876: subst: allowed also for indets in the coeff ring
- Here is an example I was trying with Sandro Logar...
- 13:57 Feature #876 (New): subst: allowed also for indets in the coeff ring
- Suppose we have a poly ring of the form @QQ(a,b)[x,y]@ and I want to substitute @b=a+1@.
Currently @subst@ refuses b...
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