Struct BandMatrix 

pub struct BandMatrix<T: GpuFloat> {
    pub data: DeviceBuffer<T>,
    pub n: usize,
    pub kl: usize,
    pub ku: usize,
}

Band matrix descriptor.

Stores a banded matrix in LAPACK-style band storage format. The storage array has (2*kl + ku + 1) rows and n columns for LU (extra kl rows for fill-in during pivoting), or (kl + ku + 1) rows and n columns for non-pivoted operations.

Fields

data: DeviceBuffer<T>

Band storage data on the device.

n: usize

Matrix dimension (n x n).

kl: usize

Number of sub-diagonals.

ku: usize

Number of super-diagonals.

Implementations

impl<T: GpuFloat> BandMatrix<T>

pub fn new(n: usize, kl: usize, ku: usize) -> SolverResult<Self>

Creates a new band matrix with the given dimensions.

Allocates a device buffer of size (2*kl + ku + 1) * n to accommodate fill-in during LU factorization.

Errors

Returns SolverError::Cuda if device allocation fails.

pub fn ldab(&self) -> usize

Returns the leading dimension of the band storage.

pub fn storage_len(&self) -> usize

Returns the total number of elements in band storage.

pub fn band_index(&self, i: usize, j: usize) -> Option<usize>

Computes the storage index for element (i, j) in the band.

Returns None if (i, j) is outside the band.