CoCalc -- 1208.sagews

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show(diff(erf(x/2),x).simplify())

<html><div class="math">\frac{e^{-x^{2

\sqrt{\pi}} }}}

p = var('p')
show(diff(erf(x/p),x))
show(diff(erf(x/p),x).simplify())

\frac{D[0]\left(\text{erf}\right)\left(\frac{x}{p}\right)}{p}

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "_sage_input_18.py", line 6, in <module>
    exec compile(ur'show(diff(erf(x/p),x).simplify())' + '\n', '', 'single')
  File "", line 1, in <module>
    
  File "expression.pyx", line 5059, in sage.symbolic.expression.Expression.simplify (sage/symbolic/expression.cpp:20256)
  File "expression.pyx", line 427, in sage.symbolic.expression.Expression._maxima_ (sage/symbolic/expression.cpp:3497)
  File "sage_object.pyx", line 371, in sage.structure.sage_object.SageObject._interface_ (sage/structure/sage_object.c:3546)
  File "/usr/local/sage/local/lib/python2.6/site-packages/sage/interfaces/expect.py", line 1031, in __call__
    return cls(self, x, name=name)
  File "/usr/local/sage/local/lib/python2.6/site-packages/sage/interfaces/expect.py", line 1447, in __init__
    raise TypeError, x
TypeError: Error executing code in Maxima
CODE:
	sage4 : ((p)^(-1))*(diff('erf(p, x), p, 1))$
Maxima ERROR:
	
Wrong number of arguments to erf