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FilledSmallSquareLinearExpressionToSparseMatrix[expr, vars] gives s, c where s is a sparse representation of the matrix m such that m . vars - c == expr.

FilledSmallSquareLinearExpressionToSparseMatrix[expr] deduces variables using Variables[expr].

FilledSmallSquareexpr must be a linear function of the variables vars.

FilledSmallSquare The sparse representation of a matrix m has the form , ->, , ->, ... where m[[, ]] = and all unspecified elements are zero.

FilledSmallSquareDeveloper`SparseLinearSolve[s, c] gives the solution to Thread[expr == 0].

FilledSmallSquare See also: Developer`LinearExpressionToMatrix.