Struct SimplexBoundaryMatrix 

pub struct SimplexBoundaryMatrix {
    pub rows: usize,
    pub cols: usize,
    pub entries: Vec<(usize, usize, i64)>,
}

A sparse integer matrix represented as a list of (row, col, value) triples.

Fields

rows: usize

Number of rows.

cols: usize

Number of cols.

entries: Vec<(usize, usize, i64)>

Nonzero entries (row, col, value).

Implementations

impl SimplexBoundaryMatrix

pub fn new(rows: usize, cols: usize) -> Self

Create a new zero boundary matrix.

pub fn set(&mut self, i: usize, j: usize, v: i64)

Set entry (i, j) to value v.

pub fn get(&self, i: usize, j: usize) -> i64

Get entry (i, j).

pub fn to_dense(&self) -> Vec<Vec<i64>>

Convert to dense matrix.

pub fn smith_normal_form_diagonal(&self) -> Vec<i64>

Compute the Smith Normal Form diagonal entries.

Returns the nonzero diagonal invariant factors.

pub fn rank(&self) -> usize

Compute the rank via SNF.

pub fn torsion_coefficients(&self) -> Vec<i64>

Compute the torsion coefficients (diagonal entries > 1).

Trait Implementations

impl Clone for SimplexBoundaryMatrix

fn clone(&self) -> SimplexBoundaryMatrix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SimplexBoundaryMatrix

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

Formats the value using the given formatter.

impl Default for SimplexBoundaryMatrix

fn default() -> SimplexBoundaryMatrix

Returns the “default value” for a type.