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asked 5 years ago

thethinker gravatar image

SageMath is not solving this inequality

I have the following inequality:

ineqal=T1Sol[0].rhs().numerator() > 0
ineqal

κm4+8πm3r4πr2>0

So it's a quadratic, but I would imagine it's solveable. Find the zeros, check the sign on either side of them, and tell me where it's positive. If you need more info, yell at me about assumptions. But instead:

solve(ineqal,r)

[[κm4+8πm3r4πr2>0]]

Sometimes I can trick it into behaving with some expand() or simplify_full(), but that seems not to be working here. Any ideas?

SageMath is not solving this inequality

I have the following inequality:

ineqal=T1Sol[0].rhs().numerator() > 0
ineqal

κm4+8πm3r4πr2>0

So it's a quadratic, but I would imagine it's solveable. Find the zeros, check the sign on either side of them, and tell me where it's positive. If you need more info, yell at me about assumptions. But instead:

solve(ineqal,r)

solve(ineqal,r)

[[κm4+8πm3r4πr2>0]]

Sometimes I can trick it into behaving with some expand() or simplify_full(), but that seems not to be working here. Any ideas?