In my case, I find it necessary to "go back one page" in the Firefox 1.5.0.8 browser. J. Tarr

Alec. Many thanks for your comments. I should have checked the definition that Maple uses for spherical coordinates, but instead relied on what is probably an antique definition from my long-gone university days. It shouldn’t make any difference because the coordinates are an ordered triple. So, in principle, one could use (p, q, r) to mean (radius, co-latitude and longitude east) without confusing Maple (I hope) but almost certainly confusing everyone else, including me! The -x^2*z*3 term was intentional, but if replaced by -x^2*z^3, the timings remain much the same, though the plot looks nicer. Have you any thoughts on why the implicitplot is so much faster than the 3d spherical coords plot? All the best, J. Tarr

Sorry Alec, I didn't see your post while I was working on a reply to the OP. Your solution is much neater. Regards, J. Tarr

Sorry Alec, I didn't see your post while I was working on a reply to the OP. Your solution is much neater. Regards, J. Tarr

Having obtained eq_fit, you could do this: a,b,c := coeffs(rhs(eq_fit),x); please see ?coeff and ?coeffs. Hope this helps. J. Tarr

Having obtained eq_fit, you could do this: a,b,c := coeffs(rhs(eq_fit),x); please see ?coeff and ?coeffs. Hope this helps. J. Tarr

Choices made for a computer language always seem to be influenced by the past. Maple had strong similarities with "Pascal", but was influenced by "Reduce" the grand-daddy of all CAS, and that was based on "Lisp", which like "Pascal" was related to "Algol" and that was ... If I remember correctly, Reduce 3 had dot and cross products in its Vector Algebra package - note the use of the name "package" - now where have we heard that before? J. Tarr

The wheel was invented by Maple 9 with standard gui. J. Tarr

The wheel was invented by Maple 9 with standard gui. J. Tarr

Since my previous post I have found that Professor Robert Israel's Advisor database has indeed been updated for Maple 10. See http://www.math.ubc.ca/~israel/advisor/advisor.html J. Tarr

Since my previous post I have found that Professor Robert Israel's Advisor database has indeed been updated for Maple 10. See http://www.math.ubc.ca/~israel/advisor/advisor.html J. Tarr

You could achieve something approaching what you want by doing this: restart; A := matrix(3,3,[[a,b,c],[d,e,f],[g,h,i]]): b := vector([x,y,z]): `v = A^(-1)*b` = linalg[linsolve](A,b); It's laborious and clunky, but as Roman Pearce said, Maple doesn't do exactly what you want. You could also experiment with document mode, but it is probably even more laborious. Hope this helps. J. Tarr

You could achieve something approaching what you want by doing this: restart; A := matrix(3,3,[[a,b,c],[d,e,f],[g,h,i]]): b := vector([x,y,z]): `v = A^(-1)*b` = linalg[linsolve](A,b); It's laborious and clunky, but as Roman Pearce said, Maple doesn't do exactly what you want. You could also experiment with document mode, but it is probably even more laborious. Hope this helps. J. Tarr

Am I missing something? Alec's procedure seems not to work with his example - it merely prints itself. J. Tarr

I agree with Alec. However, mpl appears twice in the list of file extensions. Should one of them read mws? J. Tarr