Re: Function Solve from its Property

*To*: mathgroup at smc.vnet.net*Subject*: [mg50264] Re: Function Solve from its Property*From*: Paul Abbott <paul at physics.uwa.edu.au>*Date*: Mon, 23 Aug 2004 06:34:48 -0400 (EDT)*Organization*: The University of Western Australia*References*: <cg97cc$a5k$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

In article <cg97cc$a5k$1 at smc.vnet.net>, mathma18 at hotmail.com (Narasimham G.L.) wrote: > Regarding versatililty in handling functions. Starting with a > characteristic property definition of any function, how does > Mathematica e.g., Solve[f[x_] +or- f[y_]==f[x *or/ y]] to provide its > solution f[u_]=C Log[u] ? See the article "Solving a Functional Equation" by Enrique Castillo, José Manuel Gutiérrez, and Andrés Iglesias in The Mathematica Journal 5(1), 1995: 82-86. The associated package, which I have not tested, is available at http://cdec.unican.es/ftp/herramientas/fsolve/Packages/ Cheers, Paul -- Paul Abbott Phone: +61 8 9380 2734 School of Physics, M013 Fax: +61 8 9380 1014 The University of Western Australia (CRICOS Provider No 00126G) 35 Stirling Highway Crawley WA 6009 mailto:paul at physics.uwa.edu.au AUSTRALIA http://physics.uwa.edu.au/~paul