Enum FunctionClass 

pub enum FunctionClass {
    SquaredNorm,
    EuclideanNorm,
    NegativeEntropy,
    LpNorm {
        p: f64,
    },
    BoxIndicator {
        lo: f64,
        hi: f64,
    },
    Numerical,
}

Identifies the class of a convex function for exact conjugate computation.

Variants

SquaredNorm

f(x) = (1/2) ‖x‖² — conjugate is f* = (1/2) ‖y‖².

EuclideanNorm

f(x) = ‖x‖ (Euclidean norm) — conjugate is indicator of unit ball.

NegativeEntropy

f(x) = sum_i x_i log x_i (negative entropy, domain x > 0) — conjugate is sum_i e^{y_i - 1}.

LpNorm

f(x) = (1/p) ‖x‖_p^p — conjugate is (1/q) ‖y‖_q^q (1/p + 1/q = 1).

Fields

p: f64

BoxIndicator

Indicator of a hyperbox [lo, hi]^n — conjugate is sum_i max(lo y_i, hi y_i).

Fields

lo: f64

hi: f64

Numerical

Unknown / use numerical approximation.

Trait Implementations

impl Clone for FunctionClass

fn clone(&self) -> FunctionClass

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FunctionClass

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

Formats the value using the given formatter.