#17124: Matrix constructor broken for symmetric function rings and 1-column
matrices
--------------------------+------------------------------------------------
Reporter: darij | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.4
Component: linear | Keywords: matrix, symmetric functions,
algebra | Authors:
Merged in: | Report Upstream: N/A
Reviewers: | Branch:
Work issues: | Dependencies:
Commit: |
Stopgaps: |
--------------------------+------------------------------------------------
{{{
sage: Sym = SymmetricFunctions(QQ); Sym.inject_shorthands()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/combinat/sf/sf.py:1198: RuntimeWarning: redefining global
value `e`
inject_variable(shorthand, getattr(self, shorthand)())
sage: Matrix(h, [[h[1]], [h[2]]])
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
<ipython-input-2-e73595c500f3> in <module>()
----> 1 Matrix(h, [[h[Integer(1)]], [h[Integer(2)]]])
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/matrix/constructor.pyc in _matrix_constructor(*args, **kwds)
727 ring = rings.ZZ
728
--> 729 return matrix_space.MatrixSpace(ring, nrows, ncols,
sparse=sparse)(entries)
730
731
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/matrix/matrix_space.pyc in __call__(self, entries, coerce,
copy, sparse)
468 Full MatrixSpace of 3 by 5 dense matrices over Integer
Ring!
469 """
--> 470 return self.matrix(entries, coerce, copy)
471
472 def change_ring(self, R):
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/matrix/matrix_space.pyc in matrix(self, x, coerce, copy)
1358 copy=False, coerce=coerce)
1359 else:
-> 1360 return MC(self, new_x, copy=False,
coerce=coerce)
1361 except TypeError:
1362 pass
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/matrix/matrix_generic_dense.so in
sage.matrix.matrix_generic_dense.Matrix_generic_dense.__init__
(build/cythonized/sage/matrix/matrix_generic_dense.c:2850)()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/structure/parent.so in sage.structure.parent.Parent.__call__
(build/cythonized/sage/structure/parent.c:9603)()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4256)()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4163)()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/combinat/sf/classical.pyc in _element_constructor_(self, x)
299 # Elements of the base ring #
300 #############################
--> 301 elif x.parent() is R:
302 return eclass(self,
{sage.combinat.partition.Partition([]):x})
303
AttributeError: 'tuple' object has no attribute 'parent'
}}}
Using the generic parent doesn't help either:
{{{
sage: Matrix(Sym, [[h[1]], [h[2]]])
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
<ipython-input-3-9515a5c3ba14> in <module>()
----> 1 Matrix(Sym, [[h[Integer(1)]], [h[Integer(2)]]])
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/matrix/constructor.pyc in _matrix_constructor(*args, **kwds)
727 ring = rings.ZZ
728
--> 729 return matrix_space.MatrixSpace(ring, nrows, ncols,
sparse=sparse)(entries)
730
731
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/matrix/matrix_space.pyc in __call__(self, entries, coerce,
copy, sparse)
468 Full MatrixSpace of 3 by 5 dense matrices over Integer
Ring!
469 """
--> 470 return self.matrix(entries, coerce, copy)
471
472 def change_ring(self, R):
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/matrix/matrix_space.pyc in matrix(self, x, coerce, copy)
1358 copy=False, coerce=coerce)
1359 else:
-> 1360 return MC(self, new_x, copy=False,
coerce=coerce)
1361 except TypeError:
1362 pass
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/matrix/matrix_generic_dense.so in
sage.matrix.matrix_generic_dense.Matrix_generic_dense.__init__
(build/cythonized/sage/matrix/matrix_generic_dense.c:2850)()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/structure/parent.so in sage.structure.parent.Parent.__call__
(build/cythonized/sage/structure/parent.c:9603)()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4256)()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4163)()
/home/darij/sage-6.3.beta6/local/lib/python2.7/site-
packages/sage/categories/facade_sets.pyc in _element_constructor_(self,
element)
99 except Exception:
100 pass
--> 101 raise ValueError("Can't coerce `%s` in any parent `%s`
is a facade for"%(element, self))
102
103 def facade_for(self):
ValueError: Can't coerce `([1], 1)` in any parent `Symmetric Functions
over Rational Field` is a facade for
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/17124>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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