chickadee » linear-algebra » sparse-matrix-ref

define-structure sparse-matrix row column blankrecord
define-structure sparse-matrix-row element i up downrecord
define-structure sparse-matrix-column element j left rightrecord
define-structure sparse-matrix-element value i up down j left rightrecord
create-sparse-matrix blankprocedure
sparse-matrix-ref sparse-matrix i jprocedure