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Feature #1316

Matrix row reduction (rref)

Added by John Abbott over 4 years ago. Updated about 4 years ago.

Status:
Closed
Priority:
Normal
Assignee:
John Abbott
Category:
CoCoA-5 function: new
Target version:
CoCoA-5.3.0
Start date:
19 Sep 2019
Due date:
% Done:

100%

Estimated time:
2.88 h
Spent time:
2.75 h

Description

Julian Danner would like a function for computing the "row reduced echelon form" (rref) of a matrix.

Related issues

Related to CoCoA-5 - Feature #578: Gaussian EliminationIn Progress2014-07-01

History

#1 Updated by John Abbott over 4 years ago

What exactly should the user interface be?

  • Just return the rref?
  • return rref and a transformation?
  • must the columns be considered in left-to-right order? or can the function choose a convenient order?

#2 Updated by John Abbott over 4 years ago

  • Status changed from New to In Progress
  • % Done changed from 0 to 30

I have put a simple implementation into the current "internal" version of CoCoALib (and CoCoA-5).
It is called rref.

Much to my surprise there is already an undocumented function called RowReducedForm (apparently put in by me). I do not know exactly what it does.

Not doc; no tests (yet).

#3 Updated by John Abbott about 4 years ago

  • Status changed from In Progress to Feedback
  • Assignee set to John Abbott
  • Target version changed from CoCoA-5.?.? to CoCoA-5.3.0
  • % Done changed from 30 to 90
  • Estimated time set to 2.66 h

Removed old impl. Added doc and test.

#4 Updated by John Abbott about 4 years ago

  • Status changed from Feedback to Closed
  • % Done changed from 90 to 100
  • Estimated time changed from 2.66 h to 2.88 h

#5 Updated by Anna Maria Bigatti almost 4 years ago

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