Simple LP Solver is a lightweight software that efficiently solves large linear programming problems using Simplex and Revised Simplex problem solvers, with degeneration check for Primal and Dual problems. Ideal for tackling problems requiring optimization.

In terms of problem-solving techniques, the software utilizes both single-phase and two-phase methods, depending on the type of constraints involved in the problem. For instance, if all constraints are equal constraints, a particular technique will be employed.

The software offers several methods for loading problems, such as the Input Table function, which allows users to enter the required input parameters, including decision variables and constraints (up to 250 variables and 63, 900 constraints). The Input from File function loads problems from comma-separated text (CVS) files, while the Load Table from File function loads problems from the same type of files to the Input Form. Additionally, the Save Table to File function writes problems from the Input Form to CVS files. Users can select the delimiter for CSV files.

Furthermore, the Solver comes equipped with various features to ensure that problems are solved effectively. For example, it checks the coefficients of decision variables and constraints to identify any that are zero, which it eliminates. The software also detects redundant constraints and eliminates them. Additionally, the Solver can detect negative Right Hand Side (RHS) values and converts them to positive by multiplying them by -1 and changing the equality sign accordingly.

Depending on user preferences, the software can display either the major steps of solving or simply the result. The size of the problem theoretically depends on the memory allocated to the program by the computer, with a maximum array size of typically 128M. The Solver accepts values that range from integer to floating-point numbers (in the range of 2.3E-308 to 1.7E+308), and floating numbers have 15-digit precision, although the software displays only two decimal digits.

Version **1.3.1a**:
1. Fixed minor bugs

2. Changed to online help

3. Modified autoupdate function

4. Changed web site links

5. Corrected typos