| Charles Greathouse on Thu, 05 Jul 2012 16:16:32 +0200 |
[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]
| Re: Hello |
> and how can i call a certain one of these polynomials? I assume you mean evaluate them? The command is eval. Charles Greathouse Analyst/Programmer Case Western Reserve University On Thu, Jul 5, 2012 at 10:09 AM, Ahmad Kamal <drkamal.mtc@gmail.com> wrote: > > and how can i call a certain one of these polynomials? > > Thanks alot for your help and support. > > On 5 July 2012 15:16, Karim Belabas <Karim.Belabas@math.u-bordeaux1.fr> > wrote: >> >> * Ahmad Kamal [2012-07-05 13:47]: >> > thanks alot i have tried it and it worked well, but i want to ask >> > another >> > 2 questions please: >> > >> > 1- what if i want to guarantee that the polynomial to be of degree m not >> > less than that.? >> >> x^m + random(A*x^(m-1)) \\ monic polynomial >> >> or even >> >> (1 + random(A-1)) * x^m + random(A*x^(m-1)) \\ general polynomial >> >> You may want to subtract (A>>1)*(x^(m-1)-1) / (x-1) to get positive >> and negative coefficients >> >> > 2- how can i get n polynomials ( f1(x), f2(x) , ...,fn(x)......etc)? >> >> ? f(m, A = 100) = (1 + random(A-1)) * x^m + random(A*x^(m-1)); >> ? n = 5; >> ? m = 3; >> ? vector(n, i, f(m)) >> %4 = [11*x^3 + 91*x^2 + 53*x + 46, 80*x^3 + 85*x^2 + 5*x + 55, 3*x^3 + >> 68*x^2 + 62*x + 81, 36*x^3 + 24*x^2 + 60*x + 38, 28*x^3 + 25*x^2 + 15*x + >> 81] >> >> Cheers, >> >> K.B. >> -- >> Karim Belabas, IMB (UMR 5251) Tel: (+33) (0)5 40 00 26 17 >> Universite Bordeaux 1 Fax: (+33) (0)5 40 00 69 50 >> 351, cours de la Liberation http://www.math.u-bordeaux1.fr/~belabas/ >> F-33405 Talence (France) http://pari.math.u-bordeaux1.fr/ [PARI/GP] >> ` >> >