#19405: Add lyapunov_rank() method for polyhedral cones
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Reporter: mjo | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.10
Component: geometry | Resolution:
Keywords: | Merged in:
Authors: Michael Orlitzky | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/novoselt/ticket/19405 | d01c7ab1915d95178b44c2d42f43228ca7affdc2
Dependencies: #19368 | Stopgaps:
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Comment (by novoselt):
I can tell you exactly what matrix to use for the change of coordinates
when the cone itself is returned, but I suspect you know it yourself ;-)
The method does not claim anything about which basis is used (although we
can mention it, of course) and mathematically there is no good
(=canonical) choice of basis for the sublattice of the cone. In this case
I think the best option would be to return with the cone also the matrix
of the transformation, perhaps only when requested explicitly,
`K.solid_restriction(transformation=True)`, and this matrix will be
identity in the solid case.
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Ticket URL: <http://trac.sagemath.org/ticket/19405#comment:21>
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