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join/problem

• To: mathgroup at smc.vnet.net
• Subject: [mg23045] join/problem
• From: "David Braunholtz" <D.A.BRAUNHOLTZ at bham.ac.uk>
• Date: Thu, 13 Apr 2000 02:43:30 -0400 (EDT)
• Organization: The University of Birmingham
• Reply-to: D.A.Braunholtz at bham.ac.uk
• Sender: owner-wri-mathgroup at wolfram.com

I would like to join the mathgroup list, please. The list was kind 
enough to solve a problem I had recently.

I also have another urgent, and probably trivial (once you know how) 
problem:

I have an equation

eq:=f[x,y]

I find the solution xm=x->g[y] which maximises f[x,y] for any y

I now want to define this 'maximised' function of y only fy[y]

I've tried:

fy[y_]:=f[x,y]/.xm

but this doesn't seem to recognise that I want the y s from xm to 
'match' the y_ on the LHS.

I'm also unclear as to whether I want  :=  or  =  in the above line.

Thanks in anticipation


David Braunholtz
Department of Public Health & Epidemiology
Public Health Building
University of Birmingham
Birmingham B15 2TT
E-Mail:  D.A.Braunholtz at bham.ac.uk
Tel: 0121-414-7495
FAX: 0121-414-7878