# Questions tagged [optimization]

This tag is intended for questions on methods for the (constrained or unconstrained) minimization or maximization of functions.

934 questions
Filter by
Sorted by
Tagged with
3 views

### Finding weighted sum of curves

This is related to my previous post here I have a dataset with values of multiple curves. An example plot is shown below. I want to scale the curves (move up/down) so that all curves overlap. The ...
187 views
+100

### Minimize distance between curves

I have a dataset with values of multiple curves. An example plot is shown below. I want to shift the curves (up/down) so that all curves overlap. This would mean the data points in each curve is ...
1k views

### Why aren't Krylov subspace methods popular in the Machine Learning community compared to Gradient Descent?

Historically, iterative methods for solving relatively simple-structured systems $Ax=b$ with $A$ being a $4\times 4$ matrix or to find the eigenvalues of that matrix assuming in both problems that $A$ ...
42 views

### Notation for a time series with discrete time points

I want to mathematically describe a vector containing a series of time points. The time points must lie on an equidistant time grid of 15 minutes of a day. Thus, elements of the vector can contain ...
1 vote
67 views

### Optimization software for real-valued functions of complex arguments

I am interested in an optimization problem of the form $$\min_{\boldsymbol z} \max_j \vert f_j(\boldsymbol z) \vert = \min_{\boldsymbol z} \Vert f_j(\boldsymbol z) \Vert_\infty.$$ Here, the ...
39 views

62 views

### Expressing a Constraint in an optimization problem

If I have a vector of M "continuous" decision variables (say it is called x) , and if I want a constraint to express that only one of them is allowed to have a nonzero value (i.e. no more ...
1 vote