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For PDE (to compute surface of constant total curvature, Monge form, Monge-Ampere type): $$(rt-s^2)= -(1+p^2+q^2)^2,$$ where to find solution or how to program on Mathematica?

(BC : $y=0, p=0 ; x=0, q=0 ; x=0, y=0, z= 1).$

Regards, Narasimham GL

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closed as off topic by tomasz, draks ..., robjohn Nov 26 '12 at 23:38

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You may want to ask the question there: mathematica.stackexchange.com ... –  tomasz Nov 26 '12 at 22:43
Why down voting? –  Sigur Nov 26 '12 at 22:44

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