A python module for sparse two-dimensional arrays of real numbers.

The matrices' representation is done by storing only the non-zero values, specified by tuples <i, j, v>, where i and j are indices in the matrix corresponding to the non-zero value v. The module allows the following problems to be solved:

• Matrix creation;
• Matrix display;
• Determining the matrix size;
• Reading a value and writing it in the array (the element is specified by its indices);
• The operations of adding, subtracting and multiplying two matrices;
• Access to a matrix element by its indices;
• Creating a unit matrix;
• Creating a zero matrix;
• Transposing the matrix.