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Feature #1492

submat of a submat

Added by John Abbott over 3 years ago. Updated 2 months ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
Improving
Target version:
CoCoALib-0.99900
Start date:
28 Sep 2020
Due date:
% Done:

0%

Estimated time:
Spent time:
0.25 h

Description

It might be worth refining the impl of submat so that submat(submat(M,R1,C1),R2,C2) is "clever" and returns a single level of "submat".
Currently it is not "clever".

History

#1 Updated by John Abbott over 3 years ago

  • Priority changed from Normal to Low

The reason for thinking of this is that the current impl of DetByMinors is disaapointingly slow on IdentityMat(QQ,3000).
The only cause I can think of is that submat of a submat of submat ... (nested 3000 times) becomes terribly slow.

Not important or urgent.

#2 Updated by John Abbott 2 months ago

  • Target version changed from CoCoALib-0.99850 to CoCoALib-0.99900

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