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Theoretical astrophysics.


2d
comment PenaltyFunction Option in NMinimize
you see that if you flip the penalty "PenaltyFunction" -> (-(#1^4 + #2^4) &)} it picks the opposite point?
2d
comment PenaltyFunction Option in NMinimize
Interesting question! I got it to work with 2 arguments : NMinimize[x^2 - y^2, {x, y} \[Element] Disk[], Method -> {"SimulatedAnnealing", "PenaltyFunction" -> ((#1^4 + #2^4) &)}] Show[ContourPlot[x + y, {x, y} \[Element] Disk[]], Graphics[{Red, PointSize[Large], Point[{x, y} /. Last[%]]}]] which would suggest it can take this as a penalty for points not satisfying the constraint?
2d
revised PenaltyFunction Option in NMinimize
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2d
revised Problem on limit involving complex numbers
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2d
awarded  Nice Question
2d
comment Graph smoothing keeping vertices fixed?
Thanks; and thanks for the undocumented features: makes one feel smart looking under the hood of mathematica :-)
Oct
27
comment Graph smoothing keeping vertices fixed?
I hope you don't mind the minor edit?
Oct
27
revised Graph smoothing keeping vertices fixed?
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Oct
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revised Graph smoothing keeping vertices fixed?
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Oct
27
accepted Graph smoothing keeping vertices fixed?
Oct
27
awarded  Inquisitive
Oct
26
accepted Vertex merging in graph?
Oct
26
revised Graph smoothing keeping vertices fixed?
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Oct
26
reviewed Approve suggested edit on Convert imaginary exponentials to goniometric expressions
Oct
26
revised Convert imaginary exponentials to goniometric expressions
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Oct
26
revised Graph smoothing keeping vertices fixed?
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Oct
26
revised Graph smoothing keeping vertices fixed?
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Oct
26
asked Graph smoothing keeping vertices fixed?
Oct
26
revised Vertex merging in graph?
deleted 91 characters in body; edited title
Oct
26
revised Trouble with Fourier transform of Exp[-Sqrt[x]]
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