Comment #1 on issue 3223 by [email protected]: degree((x+1)**10000) takes
too long
http://code.google.com/p/sympy/issues/detail?id=3223
as_leading_term is your workhorse:
eq=(x+1)**10000
eq.as_leading_term(x)
1
eq.subs(x,1/x).as_leading_term(x).subs(x, 1/x)
x**10000
((2*x+1)**100).subs(x,1/x).as_leading_term(x).subs(x, 1/x)
1267650600228229401496703205376*x**100
If you only want the degree, try:
def degree(e, x):
return -e.subs(x, 1/x).leadterm(x)[1]
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