Open rwst opened 9 years ago
Description changed:
---
+++
@@ -2,7 +2,8 @@
sage: diff(exp_integral_e(n,x),n) -NotImplementedError: The derivative of this function is only implemented for sage: gamma_inc(n,x).diff(n) +NotImplementedError: The derivative of this function is only implemented for +sage: gamma_inc(n,x).diff(n) D0(n, x)
sage: sympy.expint(n, x).diff(n)
Description changed:
---
+++
@@ -14,6 +14,10 @@
-meijerg(((), (1, 1)), ((0, 0, n), ()), x) - log(x)*uppergamma(n, x) + gamma(n)*polygamma(0, n)
sage: meijerg?
Object `meijerg` not found.
+
+sage: laplace(cos(-1/t), t, s, algorithm='sympy')
+...
+AttributeError: Unable to convert SymPy result (=meijerg(((), ()), ((-1/2, 0, 1/2), (0,)), s**2/16)/4) into Sage
Mpmath has numerics too.
update milestone 8.3 -> 8.4
Description changed:
---
+++
@@ -23,3 +23,5 @@
Mpmath has numerics too.
https://en.wikipedia.org/wiki/Meijer_G-function
+
+See also https://ask.sagemath.org/question/60006/meijer-g-function-in-sage/
The Meijer G function is mentioned in questions, answers, comments or discussions at:
Ask Sage question 48908: Avoid scientific notation in the Mathematica interface
Ask Sage question 43392: Force 'sympy' backend for simplifying symbolic integrals
Ask Sage question 42637: Error using algorithm="sympy" on an integral
sage-devel, 2008-08, GiNaC as the symbolic manipulation engine in Sage
Changed keywords from none to meijerg
sage: integrate(x * bessel_Y(1, x), (x, 0 ,1), algorithm="sympy")
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
/usr/lib/python3.10/site-packages/sage/interfaces/sympy.py in _sympysage_function_by_name(fname)
303 else:
304 # the function defined in sympy is not known in sage
--> 305 raise AttributeError(fname)
306 return func
307
AttributeError: meijerg
This function would allow to express the result from differentiation of several special functions with respect to the order parameter, which at the moment gives an error:
Mpmath has numerics too.
https://en.wikipedia.org/wiki/Meijer_G-function
See also https://ask.sagemath.org/question/60006/meijer-g-function-in-sage/
CC: @slel
Component: symbolics
Keywords: meijerg
Issue created by migration from https://trac.sagemath.org/ticket/17970