[sage-support] Re: Find real root
Or, if you question is more "sage" than "math" question...
...using sympy from the SAGE-wiki help and website
http://byumcl.bitbucket.org/bootcamp2013/labs/sympy.html :
example with no "x" symbolic and another one with symbolic "x"
import sympy as sym
from sympy import Symbol
x = sympy.Symbol("x")
y = sympy.Symbol("y")
roots = sym.solve(y**3 + 2*y**2 + 8, y)
print(roots)
roots = sym.solve(x^2*y**3 + (5*x+3)*2*y**2 + 8*x, y)
print(roots)
and filtering the complex (with I) symbolic roots you get the real one.
On Friday, 9 January 2015 11:35:01 UTC+1, Santanu wrote:
>
> Dear all,
>
> I have one polynomial
> f_x(y) =y^3 +f_1(x) y^2 +f_2(x) y + f_3(x).
>
> Since it is a cubic polynomial, it has atleast
> one real root.
> I want to find that real root as a function of x.
> I know that x \in [a,b].
>
>
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[sage-support] Re: Sage server failed to start
I posted trac #17610 which is ready for review. It now tries starting it > in a Terminal if it fails for any reason. This should be more robust to > any sort of corruption, and also help show the problem in the cases where > it does fail. > > For reference, this does fix the problems indicated; I hope it will also fix the problem of the original poster! -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Re: Sage server failed to start
> > >> I get about one zero sized users.pickle 2-3 times per week. >>> >> Really, how does that happen? I am also running a sagenb server on my >> university and this never happened. >> > > It is not a server, it is standalone sage installs, and ~/.sage is on NFS. > It seems to be NOT related to disk space quotas. > Given how often students log out or are logged out by naughty instructors :) from their accounts in that particular lab, it's perhaps not surprising. I agree with Jeroen that perhaps 6.5 should solve some of these issues. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Find real root
On Fri, Jan 9, 2015 at 5:34 AM, Santanu Sarkar wrote: > Dear all, > > I have one polynomial > f_x(y) =y^3 +f_1(x) y^2 +f_2(x) y + f_3(x). > > Since it is a cubic polynomial, it has atleast > one real root. > I want to find that real root as a function of x. > I know that x \in [a,b]. > There is a formula you can try to use: http://en.wikipedia.org/wiki/Cubic_function#General_formula_for_roots > -- > You received this message because you are subscribed to the Google Groups > "sage-support" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-support+unsubscr...@googlegroups.com. > To post to this group, send email to sage-support@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-support. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] set IP sage 6.4
I use sage 6.4 now I have a little problem for the IP settings I had to change the DHCP IP to IP Static How to enter the command line linux centos sage 6.4 ? -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Find real root
Dear all, I have one polynomial f_x(y) =y^3 +f_1(x) y^2 +f_2(x) y + f_3(x). Since it is a cubic polynomial, it has atleast one real root. I want to find that real root as a function of x. I know that x \in [a,b]. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
