Why are so many problems unsolved?
نویسنده
چکیده
*This chapter presents and develops what is essentially a numerical method, making use of enumeration data, that distinguishes between models that are solvable, such as staircase polygons, and unsolvable, in a particular sense, such as self-avoiding polygons. The measure of solvability is whether the generating function is differentiably finite or not. Numerical methods are developed that allow this to be tested, and the method is then illustrated by application to a number of solved and unsolved models.
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