Hi,
Attached is the code.
x = var('x')
def f(x):
if (x > 0):
return x**2
elif (x <= 0):
return -x**2
f(x).integrate(x, 0, 10)
output:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/mc/.sage/sage_notebook/worksheets/admin/2/code/58.py", line 14,
in <module>
f(x).integrate(x)
File "", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'integrate'
But the following works:
x = var('x')
def f(x):
return x**2
f(x).integrate(x, 0, 10)
output:
1000/3
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