Zippel, Richard2007-04-232007-04-231991-05http://techreports.library.cornell.edu:8081/Dienst/UI/1.0/Display/cul.cs/TR91-1209https://hdl.handle.net/1813/7049This paper presents a polynomial time algorithm for determining whether a given univariate rational function over an arbitrary field is the composition of two rational functions over that field, and finds them if so.880151 bytes328617 bytesapplication/pdfapplication/postscripten-UScomputer sciencetechnical reporttechnical report