# All Questions

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### How to use the solution of a multistage stochastic program?

Given a multistage stochastic program, its solution (if it exists) consists of the first decision vector, as well as all the recourse decision vectors for all possible scenarios of an event tree. But ...
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### existance of the solution of a PDE controlled by a value at spatially fixed point

I have a stable numerical solution for the equation shown below. However, using a simple separation of variables an instructor demonstrated non-existence of the solution for such problem. Could ...
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### Numerical methods. MDF (ILU) implementation

I am trying to implement Minimum Discarded Fill (MDF) Ordering algorithm for incomplete matrix factorization. The algorithm description is here on page 60 Preconditioning Techniques for a Newton–...
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### When training a neural network, why choose Adam over L-BGFS for the optimizer?

More specifically, when training a neural network, what reasons are there for choosing an optimizer from the family consisting of stochastic gradient descent (SGD) and its extensions (RMSProp, Adam, ...
tl;dr Using a Taylor-matched method to find coefficients for the discretized equation $\mathbf{A} \vec{f}'' = \mathbf{B} \vec{f}$, a Fortran code has been implemented to find the second derivative ...