How to multiply Matrix and Vector?

var bArray = new Entity[size];
Array.Fill(bArray, Entity.Number.Integer.One);

var bVector = MathS.Matrices.Vector(bArray);

for (int i = 0; i < 10000; i++)
{
    var product = MathS.Matrices.ScalarProduct(bVector, bVector);
    var normedVector = (bVector / MathS.Sqrt(product)).EvalTensor();
    var vector =  MatrixVectorMultiplication(tensor, normedVector);
    bVector = vector;
}

I see no way to implement MatrixVectorMultiplication (N*M x M*1 = N*1), except for manual row iteration and dot products. I tried overriden operator* and TensorVectorDotProduct, both are inapplicable (unless I create a copy of the vector as matrix with 1 column). I’d expect both GenericTensor and AngouriMath to support such basic operation.

[WhiteBlackGoose]

In case you missed, the new version is published. Wiki for it is here.

[WhiteBlackGoose]

Now you can create matrices and vectors in a more convenient way, as well as work with them. Say,

var m1 = MathS.Matrix(new Entity[,]
{
    { 1, 2 },
    { 3, 4 }
});
var v = MathS.Vector(0, 1);

var m2 = m1 * v; // performs a matrix multiplication
var len = MathS.Abs(m2).Evaled; // finds the length of a vector as square root of the sum of the squared values of the vector

To perform scalar product of two vectors, simply transpose one of them

var v1 = MathS.Vector(1, 2);
var v2 = MathS.Vector(3, 4);
var v3 = v1.T * v2;
Console.WriteLine(v3.InnerSimplified);

P. S. These updates will be relevant since 1.3-preview.2. But they’re already on the master branch