#5001: kernels of integer matrices
----------------------------+-----------------------------------------------
Reporter: jhpalmieri | Owner: was
Type: defect | Status: new
Priority: minor | Milestone: sage-3.3
Component: linear algebra | Keywords: matrix, kernel
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{{{
sage: id = matrix(ZZ, 2, 2, [[1, 0], [0, 1]])
sage: id.left_kernel()
Traceback
...
TypeError: Argument K (= Integer Ring) must be a field.
}}}
On the other hand, {{{id.right_kernel()}}} and {{{id.kernel()}}} both
work, and {{{id.kernel()}}} actually computes the left kernel. Note also
that the documentation for both left_kernel and right_kernel says that the
answer will be a vector space, not a module over the integers; this should
be fixed, too.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5001>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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