Raymond Rogers
unread,Apr 13, 2018, 12:55:12 PM4/13/18Sign in to reply to author
Sign in to forward
You do not have permission to delete messages in this group
Sign in to report message
Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message
to sage-s...@googlegroups.com
Is the Laplace transform of hypergeometric functions implemented? If
not can I have a pointer to how to implement it?
Here is an example under notebook(); jupyter throws the same error.
"TypeError: 'Integer' object is not iterable" , I tried various
alterations of the parameters; to no avail.
Since the error seems irrelevant, should I try to look at the source
(since it seems to try)?
Ray
from sympy import *
from sage.calculus import *
from sympy.integrals import laplace_transform
from sympy.abc import t, s
#from sympy.holonomic.holonomic import *
#from sympy.holonomic import DifferentialOperators, from_meijerg,
from_hyper
#from sympy.abc import x
from sympy import ZZ
#R, D = DifferentialOperators(ZZ.old_poly_ring(x), 'D')
#HolonomicFunction(D**2 + 1, x, 0, [0, 1])
#HolonomicFunction((1) + (1)*D**2, x, 0, [0, 1])
x, y,b,a= symbols('x y b a ')
k, m, n = symbols('k m n', integer=True)
f, g, h = symbols('f g h', cls=Function)
init_printing(use_unicode=True)
--- code
eq= hypergeometric([1,2-a], [2], t)
print(eq)
print("----")
eq3l=laplace_transform(eq,t,s)
print("----")
eq3l
---
response from sagemath
---
hypergeometric((1, -a + 2), (2,), t)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_23.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8
-*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("ZXFhPSBoeXBlcmdlb21ldHJpYyhbMSwyLWFdLCBbMl0sIHQpCnByaW50KGVxYSkKZXEzbD1sYXBsYWNlX3RyYW5zZm9ybShlcWEsdCxzLHBsYW5lPU5vbmUpCmVxM2w="),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmpO9ZqR1/___code___.py", line 5, in <module>
eq3l=laplace_transform(eqa,t,s,plane=None)
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sympy/integrals/transforms.py",
line 1122, in laplace_transform
return LaplaceTransform(f, t, s).doit(**hints)
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sympy/core/cache.py",
line 95, in wrapper
retval = func(*args, **kwargs)
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sympy/core/function.py",
line 427, in __new__
result = super(Function, cls).__new__(cls, *args, **options)
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sympy/core/cache.py",
line 95, in wrapper
retval = func(*args, **kwargs)
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sympy/core/function.py",
line 240, in __new__
args = list(map(sympify, args))
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sympy/core/sympify.py",
line 291, in sympify
return a._sympy_()
File "sage/symbolic/expression.pyx", line 1445, in
sage.symbolic.expression.Expression._sympy_
(build/cythonized/sage/symbolic/expression.cpp:11968)
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sage/symbolic/expression_conversions.py",
line 226, in __call__
return self.composition(ex, operator)
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sage/symbolic/expression_conversions.py",
line 794, in composition
return f_sympy(*sympy.sympify(g, evaluate=False))
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sympy/functions/special/hyper.py",
line 182, in __new__
return Function.__new__(cls, _prep_tuple(ap), _prep_tuple(bq), z)
File
"/media/rrogers/Data/opt/SageMath/local/lib/python2.7/site-packages/sympy/functions/special/hyper.py",
line 44, in _prep_tuple
return TupleArg(*[unpolarify(x) for x in v])
TypeError: 'Integer' object is not iterable