Hi guys, back again.
It seems that I can never find what I look for in the reference documents,
but it always becomes embarrassingly easy once someone explains it to me.
I've been playing around with the displacement reaction for viscous drag
ballistics, and have derived the following equation:
Hi people,
I think I saw it somewhere but cannot find it (perhaps I dreamed about
it),
I'm computing ...GR stuff... where f and g are functions of r
var('t,x,y,z,r,theta,phi');
coord = [t,x,y,z,r,theta,phi]
f = function('f', r)
g = function('g', r)
when I compute, the result looks like,
3*D[0]
Hi,
something does not work anymore in my notebook (with version 4.1.2
ubuntu 64bit):
var('a,b,c,I')
model(I)=a*I+b
model_exp = exp(I)**a*(b)
sol1_l={b: 5.0, a: 1.1}
model_sol1_l(I)=model_exp.subs(sol1_l)
The notebook hangs-up. It's critical on the parameter a, if you change
it to 1.0 it's o.
I want to substitute n values into polynomial with n variables.
I guess the syntax to do this is (if g is my polynomial with
indeterminates z[1], ..., z[n]).
f.subs({z[1]:value1, z[2]:value2, ..., z[n]:valuen})
but how do I actually do this? n is not set, so I just can't type
this out.
--~--~-
Greetings,
I am a completely new to SAGE as of a few days ago. I have used Maple
and Mathematica for years, and it is easy to do what I am describing
below in those systems. I assume it is also easy to do in sage, but I
have not been able to find it in the documentation.
Here's the story:
I a
