Struct QuadraticFunction 

pub struct QuadraticFunction {
    pub coeffs: Vec<Vec<f64>>,
    pub linear: Vec<f64>,
    pub constant: f64,
}

Quadratic objective: f(x) = 0.5 x^T Q x + c^T x + d.

Fields

coeffs: Vec<Vec<f64>>

Positive semidefinite coefficient matrix Q (n × n).

linear: Vec<f64>

Linear coefficient vector c (length n).

constant: f64

Constant term d.

Implementations

impl QuadraticFunction

pub fn new(q: Vec<Vec<f64>>, c: Vec<f64>, d: f64) -> Self

Create a new quadratic function with matrix Q, linear part c, constant d.

Trait Implementations

impl Clone for QuadraticFunction

fn clone(&self) -> QuadraticFunction

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl ConvexFunction for QuadraticFunction

fn eval(&self, x: &[f64]) -> f64

f(x) = 0.5 * x^T Q x + c^T x + d.

fn gradient(&self, x: &[f64]) -> Vec<f64>

∇f(x) = Q x + c.

fn is_strongly_convex(&self) -> bool

A quadratic function is strongly convex iff Q is positive definite (approximated here by checking that all diagonal entries are strictly positive).

impl Debug for QuadraticFunction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.