2018-08-27 11:17:49 +0100 | received badge | ● Student (source) |

2018-08-27 08:55:03 +0100 | asked a question | Check if Hessian is Postive Semi-Definite I have a log-likelihood function, and I am trying to determine if it is convex or concave to see if I can use standard optimization techniques. So I am trying to determine if the hessian is positive (or negative) semi-definite. This is what I have done: However, I am getting this error: How can I fix this so I can get what I want? Is there a better way to do this? |

2018-08-27 08:55:03 +0100 | asked a question | Determine if hessian is positive semi-definite I have a log-likelihood function, and I am trying to determine if it is convex or concave to see if I can use standard optimization techniques. So I am trying to determine if the hessian is positive (or negative) semi-definite. This is what I have done: However, I am getting this error: How can I fix this so I can get what I want? Is there a better way to do this? |

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