Struct ActionFunctional 

pub struct ActionFunctional {
    pub lagrangian: String,
    pub time_start: f64,
    pub time_end: f64,
}

Action functional S[q] = ∫_{t0}^{t1} L(q, q̇, t) dt.

Fields

lagrangian: String

The Lagrangian expression (as a string).

time_start: f64

Start time t₀.

time_end: f64

End time t₁.

Implementations

impl ActionFunctional

pub fn new( lagrangian: impl Into<String>, time_start: f64, time_end: f64, ) -> Self

Create a new action functional with Lagrangian L on [t0, t1].

pub fn is_bounded_below(&self) -> bool

Returns true if the time interval is non-degenerate (t1 > t0). For physical systems, the action is typically bounded below on bounded intervals.

Trait Implementations

impl Clone for ActionFunctional

fn clone(&self) -> ActionFunctional

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ActionFunctional

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

Formats the value using the given formatter.