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mathematical_optimization
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## CPLEX Is Free For Students (And Academics)
As part of our effort to make optimization pervasive we made our mathematical optimization products free for academic use 6 years ago. 4 years ago we r emoved license files , enabling the use of CPLEX offline for teachers, researchers and university staff. We are now making a further effort by allowing any student to use CPLEX for free. We have also streamlined the registration process on the new Academic Initiative site. If you use an email address provided by your institution, then registration... [More]
Tags: analytics mathematical_optimization |

## Solving the hardest Sudoku - part 1
Do you know the hardest Sudoku problem? Do you know the best way to solve it? Before answering these questions, let me remind you of what the Sudoku puzzle is about in case you haven't read a newspaper in the last decade (adapted from wikipedia ): The objective is to fill a 9×9 grid with digits so that the digits in each column, each row, and each of the nine 3×3 sub-grids that compose the grid (also called ""blocks") are pairwise different. The puzzle setter provides a partially completed grid, which... [More]
Tags: constraint_programming mathematical_optimization optimization analytics mathematics sudoku |

## Centers of Polygons in OPL
Ryan J. O'Neil has written an interesting post on centers of polygons . Reason I'm blogging here is that he also asks an interesting question for the case where the polygon is a rectangle. Before looking at rectangles, let's define the general problem. There are several definitions of the center of polygons, and we'll use the one used by Ryan: it is the center of the largest circle contained by the polygon. It is called the Chebyshev center of the polygon. Here is an example used by Ryan.... [More]
Tags: mathematics optimization analytics mathematical_optimization |