Kevin Nowaczyk

In BaseEncoderDecoder::createArbitraryInteger(), I state in the description: > Create an ArbitraryInteger from a number string in novel number bases and alphabets It looks like I may have oversold this function...

Matrix class refactoring

28

I’m moving some functions around and want to get your input. My plan is to make a MatrixBase trait. This trait will house methods that can work on any matrix...

Roadmap for testing

5

I found that PHP+PCOV runs unit tests much faster than PHP+Xdebug, when all you need is coverage reporting. However, PCOV will only run on PHPunit >7.0. I thought I'd document...

Matrix exponentiation?

2

I was watching a 3blue1brown video the other day where he was discussing raising e to the power of a matrix. While at first glance it does not make sense,...

Add isEqual() to the ObjectArithmetic interface.

8

Currently, all the classes in the Number namespace have methods name equals(), while Matrix has isEqual(). The polynomial class has nothing. Since PHP is loosely typed, I think we should...

Complex numbers in Vectors

4

Would you like to see an ObjectVector like the ObjectMatrix that we have. The goal being complex numbers in vector objects. If you or I do this should we move...

Expand parameter checks to include member set.

4

Since we have both discrete and continuous distributions, where parameters can be members of the integer set, natural numbers, or real numbers, it would be nice to be able to...

Allow root finding functions to use “models”

3

The “Models” that are part of the regression namespace are kind of like classed versions of closures. We could create a parent object which includes a simple `derivative()` function, which...

Use power iteration and Dimensionality reduction for eigenvalues

4

I think I figured out the general technique for simultaneously finding eigenvalues and eigenvectors for any matrix...numerically. use power iteration to find largest...this gives both the value and the vector,...

Any polynomial can be converted into a matrix, such that the eigenvalues of the matrix are the roots of the polynomial. https://en.wikipedia.org/wiki/Companion_matrix