**trinity_gurobi_test**,
a BASH code which
calls gurobi(), to read the LP file defining the trinity tiling problem,
solve the linear programming problem, and write the solution to a file.

The computer code and data files made available on this web page are distributed under the GNU LGPL license.

gurobi, examples which call gurobi(), which is an mathematical programming package for optimization, solving problems in linear programming, mixed integer programming, and mixed integer quadratic programming.

trinity, a MATLAB code which considers the trinity puzzle, a smaller version of the eternity puzzle. The trinity puzzle specifies a region R composed of 144 30-60-90 triangles, and a set of 4 "tiles", T1, T2, T3 and T4, each consisting of 36 30-60-90 triangles, and seeks an arrangement of the four tiles that exactly covers the region.

trinity_cplex_test a BASH code which calls cplex(), to read the LP file defining the trinity tiling problem, solve the linear programming problem, and write the solution to a file.

trinity_scip_test a BASH code which calls scip(), to read the LP file defining the trinity tiling problem, solve the linear programming problem, and write the solution to a file.

- trinity_gurobi_test.sh, calls on gurobi() to solve the trinity problem.
- trinity.txt, output from gurobi().
- trinity.lp, defines the problem, created by trinity_lp().
- trinity.sol, the solution information.