[ REQ 6085]: Implicit surfaces in geomview?

[daemon]

[This message arrived on geomview-users.  I'm passing it to software, and
copying it to you, Rick, in case you want to respond.]


>From geomview-users-request Sat Jan 18 09:20:13 1997
Message-Id: <v01510100af068ec6aecb@[193.48.130.42]>
Date: Sat, 18 Jan 1997 16:23:15 +0100
To: geomview-users at geom.umn.edu
From: Stephane.Simon at univ-savoie.fr ( =?iso-8859-1?Q?st=E9phane?= simon)
Subject: A question on GeomView

 I am working on singularity, stratification theory and related topics such
as stratified vector fields, intersection homology or perverse sheaves.
Algebraic varieties are of particular importance in our domain because they
have many nice and beautiful properties but also, a great deal of
singularities.

Curves and surfaces only are those that I can see (sometimes). But, if you
take a real polynomial P(X,Y,Z) in 3 variables, it is not always easy to
determine and then draw the picture of the hypersurface V={(x,y,z) :
P(x,y,z)=0} in real 3-space with (x,y,z) coordinates. I don't know any
program wich can do this job (globally), if V is not almost a graph.
So, a colleague talked to me about GeomView and said that it included an
algebraic surfaces module.
Can Geomview represent an algebraic hypersurface given by an implicit data
as a polynomial ?

Is there anyone wich can hear me and understand my very bad english ?

Thanks a lot.

Best regards, s. simon