Math. (1985) ### 2.2. T h e o r e m . A type t E A is meet-irreducible iff it contains a complete theory ( i . e . a theory T i s coprime iff it has the samc type as Some co.mplete theory).
A new pick-type theorem on the hexagonal lattice
✍ Scribed by Ren Ding; Krzysztof KoŁodziejczyk; John Reay
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 688 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
✦ Synopsis
Let L be the lattice of all vertex points in a tiling of the plane by regular hexagons of unit area. Suppose the vertices of a planar polygon P are points of the lattice L, and points of L occur frequently along the edges of P. Then the area of P is A(P) = ;b + ii + &c -1, where b is the number of lattice points on the boundary of P, i is the number of lattice points in the inter;-* .Vm of P, and c is the boundary characteristic of P.
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