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Thanks, again, for this great tool.
I'm interested in computing purely mixed second derivatives. For example, if I have a function:
f(x₁,x₂,y₁,y₂,y₃)
then I'm interested in the rectangular ma…
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As discussed with @mlubin during JuMP-dev 2024, we recently observed with Guillaume Dalle (@gdalle) that JuMP detects additional non-zeros on the diagonal of the Hessian than what is needed.
We als…
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### Issue Type
Bug
### Source
pip (mct-nightly)
### MCT Version
PR #1186
### OS Platform and Distribution
Linux Ubuntu 22.04
### Python version
3.10
### Describe the issu…
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Hello All
I am a new user with little experience with cpp so be nice to me.
obj$fn and obj$gr in TMB examples return the function value to minimize, and its gradient.
obj$he() is there too, and it s…
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反序列化失败类：com.baomidou.mybatisplus.core.conditions.segments.MergeSegments
异常栈：
```
com.alibaba.jvm.sandbox.repeater.plugin.core.serialize.SerializeException: [Error-1002]-hessian-deserialize-error
…
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Version (2019-07-25), Chapter 5, Section 5.7:
By definition, the hessian in equation 5.147 is always symmetric, I suggest you first properly define the hessian (like in 5.171) and then explain how t…
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Shall we use a bordered hessian??
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The Hessian matrix could also be evaluated using finite difference method.
- Some info could be taken from https://en.wikipedia.org/wiki/Finite_difference#Relation_with_derivatives
- The matrix …
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I'm having some performance issues with a modestly sized model (37 parameters). The fitting takes a rather long time and profiling revealed that 80% of time time is spend in calling ``coveranciance_ma…
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I am currently experimenting with a FOSS SQP method, SLSQP, trying to replace the old numerically unstable Lawson-Hanson LSEI solver with a more modern, more reliable QP solver. See: https://github.co…