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Intra functional relations

• To: mathgroup at smc.vnet.net
• Subject: [mg47493] Intra functional relations
• From: mathma18 at hotmail.com (Narasimham G.L.)
• Date: Wed, 14 Apr 2004 07:16:47 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

This may be almost frivolous: If f[x_]+f[y_]=f[x*y],then,
can Mathematica prove or solve f[x_]= C Log[x],( C arbitrary constant)
?
Also, if g[x_+y_]=g[x]*Sqrt[1- g[y]^2] + Sqrt[1- g[x]^2]*g[y],then,
can it be proved that g[x_]=Sin[x]? Can the function capabilities of
Mathematica in some way be put to use here?  Regards.

• Follow-Ups:
  • Re: Intra functional relations
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>