Economical triangle-square dissection
β Scribed by M. J. Cohn
- Publisher
- Springer
- Year
- 1975
- Tongue
- English
- Weight
- 745 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0046-5755
No coin nor oath required. For personal study only.
β¦ Synopsis
In the 1830's, it was proved almost simultaneously by W. Bolyai and Gerwien that given any two polygons of equal area, it is possible to dissect one into a finite number of pieces which may be rearranged to form the other. In this paper the dissection of a triangle to give a square is considered. No estimate has been made previously on the economy of such a dissection. A dissection which is probably close in economy to the most economical dissection is found, and an estimate is made as to how uneconomical any dissection must be.
π SIMILAR VOLUMES
The random triangle-square tiling with twelvefold quasicrystalline order is studied by using the transfer-matrix method. Based on a systematic finite-size analysis for L Γ oo lattices up to L = 9, the maximum entropy per vertex for an infinite system is estimated to be S= 0.119 \_+ 0.00 I. The ratio
## Abstract Let __T__=(__T__^\*^, __T__^β΅^) be a spherical latin bitrade. With each __a__=(__a__~1~, __a__~2~, __a__~3~)β__T__^\*^ associate a set of linear equations __Eq__(__T, a__) of the form __b__~1~+__b__~2~=__b__~3~, where __b__=(__b__~1~, __b__~2~, __b__~3~) runs through __T__^\*^\{__a__}.
Every polygon can be dissected into acute triangles. In this paper we prove that every polygon, such that the interior angles are at least n/5, can be dissected into triangles with interior angles all less than or equal to 2n/5. We find necessary conditions on the interior angles of the polygon in o