Abstract
The Yang-Lee edge singularity of the square-lattice Ising ferromagnet in a nonzero magnetic fleld provides indispensable information for flnding its unknown solution. The location of the Yang-Lee edge singularity of the square-lattice Ising ferromagnet is accurately estimated from the exact grand partition functions of the Ising model in a nonzero magnetic fleld on L £ L square lattices (up to L = 16).
Published Version
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