slp

SolHOP Linear Programming Solver.

Install and Run

Install

$ cargo install slp

Run

$ slp input.txt

where input.txt contains the LP instance to be solved.

If no file is provided then input is taken from stdin.

To enable data parallelism use -p flag.

$ slp input.txt -p

For more options, see help.

$ slp -h

Input format

The input is provided throught stdin.

An example of LP instance is

max        2x1 + 3x2
subject to 2x1 +  x2 <= 18
           6x1 + 5x2 <= 60
           2x1 + 5x2 <= 40
            x1       >= 0
            x2       >= 0

The corresponding input format is

3 2 # 3 is number of constraints and 2 is number of variables
2 3 # coefficients of objective function to be maximized: 2x1 + 3x2
2 1 18 # Constraint 1: 2x1 +  x2 <= 18
6 5 60 # Constraint 2: 6x1 + 5x2 <= 60
2 5 40 # Constraint 3: 2x1 + 5x2 <= 40
# x1 >= 0 and x2 >= 0 are always assumed

Output format

The output of the slp solver is sent to stdout and it can be one of the following:

INFEASIBLE

or

UNBOUNDED

or

OPTIMAL 28
SOLUTION 5 6

representing the objective value to be 28 and the solution as x1 = 5, x2 = 6.

License

MIT