关于函数方程f(p(z))=g(q(z)),其中p,q是“广义”多项式,f,g是亚纯函数
On the functional equation f(p(z))=g(q(z)), where p,q are "generalized" polynomials and f,g are meromorphic functions
摘要:
研究了函数方程f(p(z))=g(q(z)),其中p,q是多项式,f,g是C中的超越亚纯函数.我们找到所有存在满足我们方程的非常数f,g且不存在具有此性质的有理数f,g的对p,q。事实上,一个更普遍的问题得到了解决。除代数方法外,还使用了局部解析动力学的一些结果。
英文摘要:
The functional equation f(p(z))=g(q(z)) is studied, where p,q are polynomials and f,g are trancendental meromorphic functions in C. We find all the pairs p,q for which there exist nonconstant f,g satisfying our equation and there exist no rational f,g with this property. In fact, a more general problem is solved. In addition to algebraic methods, some results from local analytic dynamics are used.
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