I apologize. The issue was there before (tested on sage 8.6). I open a
ticket. Agreed?
However, how are beta issues managed?
Best regards
Michael
Am Sonntag, 14. April 2019 10:35:13 UTC+2 schrieb Michael Jung:
>
> Since 8.8beta1 there is a critical issue regarding scalar fields:
>
> sage: M = Manifold(2, 'M')
> sage: X.<x,y> = M.chart()
> sage: f = M.scalar_field(x, name='f')
> sage: f in M.diff_form_module(1)
> ---------------------------------------------------------------------------
> AttributeError Traceback (most recent call last)
> <ipython-input-38-9654b754d2bc> in <module>()
> 2 X = M.chart(names=('x', 'y',)); (x, y,) = X._first_ngens(2)
> 3 f = M.scalar_field(x, name='f')
> ----> 4 f in M.diff_form_module(Integer(1))
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/structure/parent.pyx
> in sage.structure.parent.Parent.__contains__
> (build/cythonized/sage/structure/parent.c:9885)()
> 1090 return True
> 1091 try:
> -> 1092 x2 = self(x)
> 1093 EQ = (x2 == x)
> 1094 if EQ is True:
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/structure/parent.pyx
> in sage.structure.parent.Parent.__call__
> (build/cythonized/sage/structure/parent.c:9219)()
> 898 if mor is not None:
> 899 if no_extra_args:
> --> 900 return mor._call_(x)
> 901 else:
> 902 return mor._call_with_args(x, args, kwds)
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/structure/coerce_maps.pyx
> in sage.structure.coerce_maps.DefaultConvertMap_unique._call_
> (build/cythonized/sage/structure/coerce_maps.c:4551)()
> 160 print(type(C), C)
> 161 print(type(C._element_constructor),
> C._element_constructor)
> --> 162 raise
> 163
> 164 cpdef Element _call_with_args(self, x, args=(), kwds={}):
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/structure/coerce_maps.pyx
> in sage.structure.coerce_maps.DefaultConvertMap_unique._call_
> (build/cythonized/sage/structure/coerce_maps.c:4443)()
> 155 cdef Parent C = self._codomain
> 156 try:
> --> 157 return C._element_constructor(x)
> 158 except Exception:
> 159 if print_warnings:
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/differentiable/diff_form_module.pyc
> in _element_constructor_(self, comp, frame, name, latex_name)
> 818 resu = self.element_class(self._fmodule, self._degree,
> name=name,
> 819 latex_name=latex_name)
> --> 820 if comp != []:
> 821 resu.set_comp(frame)[:] = comp
> 822 return resu
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/scalarfield.pyc
> in __ne__(self, other)
> 1285
> 1286 """
> -> 1287 return not (self == other)
> 1288
> 1289 ####### End of required methods for an algebra element (beside
> arithmetic) #######
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/scalarfield.pyc
> in __eq__(self, other)
> 1244 return False
> 1245 try:
> -> 1246 other = self.parent()(other) # conversion to a
> scalar field
> 1247 except TypeError:
> 1248 return False
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/structure/parent.pyx
> in sage.structure.parent.Parent.__call__
> (build/cythonized/sage/structure/parent.c:9219)()
> 898 if mor is not None:
> 899 if no_extra_args:
> --> 900 return mor._call_(x)
> 901 else:
> 902 return mor._call_with_args(x, args, kwds)
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/structure/coerce_maps.pyx
> in sage.structure.coerce_maps.DefaultConvertMap_unique._call_
> (build/cythonized/sage/structure/coerce_maps.c:4551)()
> 160 print(type(C), C)
> 161 print(type(C._element_constructor),
> C._element_constructor)
> --> 162 raise
> 163
> 164 cpdef Element _call_with_args(self, x, args=(), kwds={}):
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/structure/coerce_maps.pyx
> in sage.structure.coerce_maps.DefaultConvertMap_unique._call_
> (build/cythonized/sage/structure/coerce_maps.c:4443)()
> 155 cdef Parent C = self._codomain
> 156 try:
> --> 157 return C._element_constructor(x)
> 158 except Exception:
> 159 if print_warnings:
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/scalarfield_algebra.pyc
> in _element_constructor_(self, coord_expression, chart, name, latex_name)
> 470
> coord_expression=coord_expression,
> 471 name=name,
> latex_name=latex_name,
> --> 472 chart=chart)
> 473 return resu
> 474
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/differentiable/scalarfield.pyc
> in __init__(self, parent, coord_expression, chart, name, latex_name)
> 630 """
> 631 ScalarField.__init__(self, parent,
> coord_expression=coord_expression,
> --> 632 chart=chart, name=name,
> latex_name=latex_name)
> 633 self._tensor_type = (0,0)
> 634
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/scalarfield.pyc
> in __init__(self, parent, coord_expression, chart, name, latex_name)
> 1101 self._express[ch] =
> ch.function(coord_expression)
> 1102 else:
> -> 1103 self._express[chart] =
> chart.function(coord_expression)
> 1104 self._init_derived() # initialization of derived quantities
> 1105
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/chart.pyc
> in function(self, expression, calc_method, expansion_symbol, order)
> 1087 return parent.element_class(parent, expression,
> calc_method=calc_method,
> 1088 expansion_symbol=expansion_symbol,
> -> 1089 order=order)
> 1090
> 1091 def zero_function(self):
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/chart_func.pyc
> in __init__(self, parent, expression, calc_method, expansion_symbol, order)
> 360 calc_method = self._calc_method._current
> 361 self._express[calc_method] =
> self._calc_method._tranf[calc_method](
> --> 362
> expression)
> 363 # Derived quantities:
> 364 self._der = None # list of partial derivatives (to be set by
> diff()
>
> /home/michi/GitProjects/sage/local/lib/python2.7/site-packages/sage/manifolds/calculus_method.pyc
> in _Sympy_to_SR(expression)
> 106 # If SR cannot transform a sympy expression this is because
> it is a
> 107 # sympy abstract function
> --> 108 a = expression._sage_()
> 109 # As all sage objects have a ._sage_ operator, they have to be
> 110 # catched
>
> AttributeError: 'list' object has no attribute '_sage_'
>
> Code hier eingeben...
>
> I'm not sure if tickets of beta issues are welcome.
>
> Best Regards
> Michael
>
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