flo-poly/src/norm/double/p-2-norm.ts

A practical, root-focused JavaScript polynomial utility library.

/**
 * Returns the `p-2 norm`, i.e. `Euclidean norm` of the given array of numbers
 * (with intermediate calculations done in double precision).
 * 
 * @param p an array of numbers; can represent an array of polynomial 
 * coefficients
 * 
 * @doc
 */
function p2Norm(p: number[]): number {
    let s = 0;
    for (let i=0; i<p.length; i++) {
        s += p[i]**2;
    }
    
    return Math.sqrt(s);
}


export { p2Norm }