[sage-support] solving 3 dimensional equations

2008-06-21 Thread Max
Hi, i am looking for a way to solve this equation 10* (2* x^2 + y^2 + z^2 - 1)^3- x^2*z^3 - 10*y^2* z^3=0 to z but I did not find a way to do it in sage. So if anybody knows how to do it please answer me- Thanks. --~--~-~--~~~---~--~~ To post to this group, send

[sage-support] Re: Page Load Error in Firefox, Using VMWare under Windows Vista

2008-06-21 Thread ronaldlesterbrooks
This is embarrasing but in the interest of technical honesty I have to confess that I created a book mark in Firefox for Sage. I don't know how but the IP in the book mark was wrong. That fixed it. Works great now. On Jun 20, 11:32 am, ronaldlesterbrooks [EMAIL PROTECTED] wrote: Thank you for

[sage-support] Re: Difference between definite and indefinite integration

2008-06-21 Thread David Joyner
Unless 24.9... = -24.9..., there seems to be a bug: sage: f = sqrt(25-x)*sqrt(1+1/(4*(25-x))) sage: f.integral(x,9,16) integrate(sqrt(1/(4*(25 - x)) + 1)*sqrt(25 - x), x, 9, 16) sage: f.nintegral(x,9,16) (24.9153783348643, 2.7661626694613149e-13, 21, 0) sage: g = f.simplify_radical() sage:

[sage-support] Re: solving 3 dimensional equations

2008-06-21 Thread David Joyner
This is a 6th degree polynomial in z. There is no general formula for algebraically solving for roots of polynomials of degree 5 or higher. On Fri, Jun 20, 2008 at 8:20 PM, Max [EMAIL PROTECTED] wrote: Hi, i am looking for a way to solve this equation 10* (2* x^2 + y^2 + z^2 - 1)^3- x^2*z^3

[sage-support] Re: solving 3 dimensional equations

2008-06-21 Thread Maximilian Lepik
ok thanks. Do you no any other way how I could solve it 2008/6/21 David Joyner [EMAIL PROTECTED]: This is a 6th degree polynomial in z. There is no general formula for algebraically solving for roots of polynomials of degree 5 or higher. On Fri, Jun 20, 2008 at 8:20 PM, Max [EMAIL

[sage-support] Re: solving 3 dimensional equations

2008-06-21 Thread David Joyner
In this special case, if you let A = ((x^2 + 10*y^2)/10^(1/3) (assuming I did the algebra right, note there are 3 such A's, but only 1 real one) then you get sage: A = var(A); solve(2* x^2 + y^2 + z^2 - 1- A*z==0,z) [z == (A - sqrt(A^2 - 4*y^2 - 8*x^2 + 4))/2, z == (sqrt(A^2 - 4*y^2 - 8*x^2 +

[sage-support] gmp build fail on fedora 9

2008-06-21 Thread dbk
Hi all, I'm getting a strange configure problem building 3.02 on fedora 9 running on X86_64 system; First I get; GCC Version gcc -v Using built-in specs. Target: x86_64-redhat-linux

[sage-support] Re: gmp build fail on fedora 9

2008-06-21 Thread mabshoff
On Jun 21, 7:35 pm, dbk [EMAIL PROTECTED] wrote: Hi all, Hi Don, I'm getting a strange configure problem building 3.02 on fedora 9 running on X86_64 system; The problem is not FC9 specific, see below for more info. First I get;

[sage-support] Re: gmp build fail on fedora 9

2008-06-21 Thread dbk
Hi Michael, Thanks for the discussion link. I'll play around a little with the patch and see if I can do anything with config.guess. Looks like a pretty tricky build! If I come up with anything useful I'll be sure to let you know. Take care -Don