Lobachevskii Journal of Mathematics

, Volume 39, Issue 3, pp 439–447

# Formation of the Guillotine Cutting Card of a Sheet by Guillotine Layout Functions

• A. A. Andrianova
• T. M. Mukhtarova
• V. R. Fazylov
Article

## Abstract

An extension of the concept of the guillotine layout function has been proposed for solving the problem of rectangular orthogonal packing; this extension is a function that assigns a triple of values to the sheet width. In addition to the standard effect for the guillotine layout function (the sheet with a given width has a minimum length), which is sufficient to arrange a given set of rectangles in a guillotine manner, two additional values have been used. They describe the method of cutting this sheet to uniquely form a guillotine cutting card and a guillotine layout card of the set of rectangles. These data involve the characteristics of the first cut of the sheet as well as the partition of the set of rectangles corresponding to the cut into two subsets, which is uniquely determined by the number of one of these subsets. The description of the first cut is modeled by a single numerical value that reflects both the size of the offset from the lower-left corner of the sheet and the orientation of the cut: a cut is required along or transverse of the sheet. It has been shown that this information is sufficient for the recovery of the guillotine cutting card and the guillotine layout card for a set of rectangles. Modifications of the algorithms for calculating the sum of two right-semicontinuous monotonically nonincreasing step functions with a finite number of steps and the minimum of two functions of this type have been proposed to determine additional information about the first cut and calculate the extension of the guillotine layout function. Also, an algorithm for the formation of a guillotine cutting card and a guillotine layout card for rectangles has been proposed that uses the calculated extensions of guillotine layout functions for all subsets of the required set of rectangles.

## Keywords

Rectangular orthogonal packing guillotine cutting extension of guillotine layout function

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## Authors and Affiliations

• A. A. Andrianova
• 1
• T. M. Mukhtarova
• 1
• V. R. Fazylov
• 1
1. 1.Kazan (Volga Region) Federal UniversityKazanRussia