【摘要】 四角系统的完美匹配有很强的统计物理背景．本文给出了渺位四角系统完美匹配数的一个计算方法．更多还原

【Abstract】 A polyomino (graph) is a connected finite subgraph of the infinite plane grid such that each interior face is surrounded by a unit square (called a cell) and each edge belongs to at least one cell.A catacondensed polyomino is a 2 connected subgraph of a polyomino such that no four cells have a common vertex.In this paper,a way for calculating the number of perfect matchings in catacondensed polyominoes is given.更多还原