# 6 Matrix

- [Multiply Sparse Matrix](/code/data-structure/matrix/multiply-sparse-matrix.md)
- [Matrix Diagonal Traverse](/code/data-structure/matrix/matrix-diagonal-traverse.md)
- [Valid Sudoku](/code/data-structure/matrix/valid-sudoku.md)
- [Spiral Matrix](/code/data-structure/matrix/spiral-matrix.md)
