Wrong limit result for Abs((-n/(n+1))**n)

[satels]

import sympy

from sympy import S, Symbol, limit, oo

print('sympy version:', sympy.__version__)

n = Symbol('n', real=True)

expr = (n/(n+1))**n
print(limit(expr, n, oo))  # Success

expr = (-n/(n+1))**n
print(limit(expr, n, oo))  # Wrong

expr = Abs((-n/(n+1))**n)
print(limit(expr, n, oo))  # Wrong

The result:

sympy version: 1.12
exp(-1)
0
0

[anutosh491]

Thanks for raising this. We do perform poorly when it comes to limits (bi-directional, or at infinities too ... you can easily find similar errors for -oo too ) involving the abs function.