Struct DeviceSaeFrameData 

pub struct DeviceSaeFrameData {
    pub ranks: Vec<usize>,
    pub basis_sizes: Vec<usize>,
    pub border_offsets: Vec<usize>,
    pub frame_blocks: Vec<FactoredFrameGBlock>,
    pub smooth_ranks: Vec<usize>,
    pub row_htbeta: Vec<Vec<f64>>,
}

Frame-factored extension of DeviceSaePcgData (issue #1017/#1026, frames-engaged device PCG). Present only when at least one atom is genuinely frame-reduced (ranks[k] < p); absent (None) on the full-B path, where the legacy G ⊗ I_p channel-identical kernel applies byte-for-byte.

On the frames path the β border is the FACTORED coordinate space C of width Σ_k M_k·r_k, the data-fit β-Hessian is G_{ij} ⊗ W_{ij} (W_{ij}=U_iᵀU_j, carried on frame_blocks), the smooth penalty is λ S_k ⊗ I_{r_k} (smooth_blocks, reused — width r_k instead of p), and the per-row reduced-Schur cross-block H_tβ^(i) is the DENSE (q_i × border_dim) slab row_htbeta[i] (row-major) rather than the full-B factored L_i · J_β gather (so a_phi/local_jac are unused on this path).

Fields

ranks: Vec<usize>

Per-atom frame rank r_k (factored output width); r_k == p for an un-framed atom riding the identity special case.

basis_sizes: Vec<usize>

Per-atom basis size M_k.

border_offsets: Vec<usize>

Per-atom factored-border offset off_C[k] (prefix sum of M_k·r_k), length n_atoms. Atom k’s C_k block is [off_C[k] .. +M_k·r_k).

frame_blocks: Vec<FactoredFrameGBlock>

Co-occurring (atom_i, atom_j) data-fit blocks g ⊗ w (w = U_iᵀU_j).

smooth_ranks: Vec<usize>

Right-factor width (r_k) of each entry of the top-level DeviceSaePcgData::smooth_blocks, in the SAME order. On the frames path the smooth penalty is λ S_k ⊗ I_{r_k} so the block at smooth_blocks[i].global_offset has identity width smooth_ranks[i] (which equals ranks[atom]), NOT the ambient p.

row_htbeta: Vec<Vec<f64>>

Per-row dense cross-block H_tβ^(i) as a row-major q_i × border_dim buffer (q_i = row_dims[i]). Empty inner Vec for a 0-dim row.

Trait Implementations

impl Clone for DeviceSaeFrameData

fn clone(&self) -> DeviceSaeFrameData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeviceSaeFrameData

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

Formats the value using the given formatter.