Status: Started
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 3786 by smi...@gmail.com: Sum and Product subs problems
http://code.google.com/p/sympy/issues/detail?id=3786
Integral(x,(x,1,x+y)).subs(x,1) # CORRECT
Integral(x, (x, 1, y + 1))
Sum(x,(x,1,x+y)).subs(x,1) # this doesn't replace the x
Sum(x, (x, 1, x + y))
Product(x,(x,1,2)) # raises Traceback
Product(x, (x, 1, 2))
_.subs(x,1)
Traceback (most recent call last):
...
ValueError: Invalid limits given: ((1, 1, 2),)
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