"""Sparse matrix operations.
Provides sparse matrix construction and arithmetic backed by the SciRS2 Rust
implementation. The API mirrors ``scipy.sparse`` for easy migration.
Classes
-------
csr_matrix : Compressed Sparse Row matrix
csc_matrix : Compressed Sparse Column matrix
coo_matrix : COOrdinate format sparse matrix
Functions
---------
eye : Sparse identity matrix
diags : Sparse matrix from diagonals
spsolve : Solve a sparse linear system
splu : Sparse LU factorisation
linalg : Sparse linear algebra utilities (eigsh, svds)
"""
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