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我们应用突变论:(Catastrophe theory)讨论了均匀各向同性和均匀非各向同性Ising晶格系统可容纳相数的问题。d=3的Ising晶格系统至少可容纳三个相。Catastrophe theory is applied to investigate the number of permissible phases in Ising lattice system. It is shown that the system with d=3 can contain three phases at least.
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