Project

General

Profile

Feature #310

ordering and grading (weights) matrix

Added by Anna Maria Bigatti about 11 years ago. Updated over 9 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Anna Maria Bigatti
Category:
Renaming
Target version:
CoCoALib-0.99534 Seoul14
Start date:
13 Feb 2013
Due date:
% Done:

100%

Estimated time:
5.30 h
Spent time:
3.10 h

Description

We should have a function for accessing the matrix and the grading/weights matrix of a PPOrdering.

Now we have GetMatrix (I wrote it in 2004) but I do not like that name for many reasons: OrderingMat?
And the other? WeightMat? GradingMat?

2014-07 Choice was made: OrdMat and GradingMat

As PPOrdering is implemented now, these functions would be forced to make a new matrix (because some orderings do not have a matrix to reference).
We could store a MatrixView in all PPOrderings, but I think this is not a problem.

2014-07 this moved to a specific issue #602

Related issues

Related to CoCoA-5 - Feature #78: Elim ordering and matrix ordering in CoCoA-5In Progress2012-01-16

Related to CoCoALib - Feature #174: IsStdGraded: add for PPOrdering, PPMonoid, (Sparse)PolyRing..New2012-06-01

Related to CoCoALib - Support #256: Improve doc about ordering/grading for poly ringsClosed2012-10-08

Related to CoCoALib - Design #602: OrdMat: should it be a reference to a MatrixView in all PPOrderings?Closed2014-07-31

History

#1 Updated by Anna Maria Bigatti over 10 years ago

  • Target version changed from CoCoALib-0.9953 to CoCoALib-0.99532

#2 Updated by Anna Maria Bigatti about 10 years ago

  • Target version changed from CoCoALib-0.99532 to CoCoALib-0.99533 Easter14

#3 Updated by John Abbott about 10 years ago

  • Target version changed from CoCoALib-0.99533 Easter14 to CoCoALib-0.99534 Seoul14

#4 Updated by John Abbott over 9 years ago

  • Status changed from New to In Progress
  • Assignee set to John Abbott
  • % Done changed from 0 to 20
  • Estimated time set to 5.30 h

We have chosen the name OrdMat (and mem fn called myOrdMatCopy). Also added this fn for PPMonoid and SparsePolyRing -- trivial one line defns.

Unresolved aspects:
  • is this fn actually useful? Maybe GradingMat is more useful? (check where/how OrdMat is used!)
  • we are considering putting a ConstMatrixView into every PPOrdering so this fn could simply return a reference to that (rather than make a dense copy)

Note: GradingMat can easily be simulated by submat(OrdMat(...),...) but you cannot get OrdMat from GradingMat.

#5 Updated by John Abbott over 9 years ago

  • Target version changed from CoCoALib-0.99534 Seoul14 to CoCoALib-1.0

Postponing to after Seoul as there are some unresolved aspects.

#6 Updated by Anna Maria Bigatti over 9 years ago

  • Status changed from In Progress to Resolved
  • Assignee deleted (John Abbott)
  • Target version changed from CoCoALib-1.0 to CoCoALib-0.99534 Seoul14
  • % Done changed from 20 to 70

Renaming done: OrdMat, GradingMat (2014-07)

Moving the MatrixView proposal into another issue

#7 Updated by Anna Maria Bigatti over 9 years ago

  • Status changed from Resolved to Closed
  • Assignee set to Anna Maria Bigatti
  • % Done changed from 70 to 100

Also available in: Atom PDF