Struct ProximalMapping 

pub struct ProximalMapping {
    pub f: String,
    pub lambda: f64,
}

Proximal mapping of a function f with parameter λ > 0.

Fields

f: String

Name or formula of the function f.

lambda: f64

Regularisation parameter λ > 0.

Implementations

impl ProximalMapping

pub fn new(f: impl Into<String>, lambda: f64) -> Self

Create a new ProximalMapping.

pub fn prox_point(&self) -> String

Compute the proximal point (conceptually): prox_{λf}(x) = argmin_y {f(y) + |y-x|²/(2λ)}.

pub fn firm_nonexpansive(&self) -> String

Firm nonexpansiveness of the proximal mapping.