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As you can see, I have attempted Goursat [Gobstopper]... not to avail. Will try again from the Mathcad program, via Spline Matrix => f(u,v). Jean  Rotate Goursat.sm (385kb) downloaded 29 time(s).
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Joined: 15/07/2010(UTC) Posts: 437   Location: Beer-Sheva Was thanked: 520 time(s) in 288 post(s)
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Hello, Jean. The algorithm is only suitable for constructing simply-connected Surfaces without singular points. Therefore, for the first surface it not approached, and the second turned out to be of poor quality. The second surface and its upper half, constructed with the help of the new algorithm.   GoursatJean.sm (29kb) downloaded 26 time(s).
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Rank: Guest
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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Thanks Ber7 for the explanation.
Will come back, because very slow on my Win 7 ...
Jean
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Joined: 30/09/2012(UTC) Posts: 61  Was thanked: 13 time(s) in 8 post(s)
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Originally Posted by: Ber7  Hello, Jean. The algorithm is only suitable for constructing simply-connected Surfaces without singular points. Therefore, for the first surface it not approached, and the second turned out to be of poor quality. The second surface and its upper half, constructed with the help of the new algorithm. GoursatJean.sm (29kb) downloaded 26 time(s). Such a graph is possible only for a>0
(x1*x2)^2+(x2*x3)^2+(x1*x3)^2 - a=0;
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