aszanti's profile - activity

maybe 56 after all

for i in range(0,5): print(sol[i].rhs())

for i in range(0,5): print(sol[i].rhs())

beautiful, thank you

Look: u(x)=cos(x)^2 v(x)=cos(x-(2/3)*pi)^2 w(x)=cos(x-(4/3)*pi)^2 and plot plot((v+w+u)*2/3,-4,4)

unfortunately - ./configure no such file or directory

Thx. I only have /usr/bin/python3.9, I'll wait for these corrections.

Hi, After upgrading from SageMath-9.1 to SageMath-9.2, sage -n jupyter fails

SystemError Python 3.9.0: /usr/bin/python3 Wed Nov 4 11:46:44 2020 A problem occurred executing Python code. Here is the sequence of function calls leading up to the error, with the most recent (innermost) call last. /usr/lib64/python3.9/site-packages/sage/rings/real_lazy.pyx in sage.rings.real_lazy.LazyFieldElement.__complex__ (build/cythonized/sage/rings/real_lazy.c:10039)() .....

Hello dsejas! I understand now, thank you very much for this explanation.

Why is "qdot" in the equation eom1? Maybe it should be like F.SemihDündar wrote, i.e. eom1 = qdot (t). In this case, we will receive another solution.

only: implicit_plot3d(x^2+y^2+z^2==4, (x,-3,3), (y,-3,3), (z,-3,3))

It's already great. After updating the application, everything works well in the notebook. SAGE is good! Thx

Thanks for your suggestion. Here is my environment: environ variable SAGE_PYTHON3 -> yes ..... environ variable SAGE_ETC -> /usr/share/sagemath/etc environ variable DOT_SAGE -> /home/aszanti/.sage

In terminal the ipyton session all is well. The problem and the described error occur in the Jupyter notebook. $ sage -n jupyter

Thank you very much, I was looking for this image (Lorentz transformation). Thanks.

I have equations and the 2D curve drawing in polar coordinates.

Equations and 2D curve drawing in polar coordinates.

var('beta, phi, R, d')

# Transformation function
a(phi, beta) = (cos(phi) + beta)/(1 + beta*cos(phi))

# Two equations in polar coordinates
r1(phi, beta, R, d) = d*a + sqrt(d^2*(a^2 - 1) + R^2)
r2(phi, beta, R, d) = d*a - sqrt(d^2*(a^2 - 1) + R^2)

Plot both charts for parameters beta=0.8, R=1, d=2.

p = polar_plot(r1(phi, 0.8, 1, 2), (-pi/2 + 0.16, -0.16 + pi/2), color='red')
p += polar_plot(r2(phi, 0.8, 1, 2), (-pi/2 + 0.18, pi/2 - 0.18))
p

Thanks for the answer. Is there a workaround for this problem? I hope this will be fixed soon.

You cannot define a function! for example: after f (x) = x ^ 2 + 1 we get the error:

TypeError Traceback (most recent call last)

/usr/lib64/python3.8/codeop.py in __call __ (self, source, filename, symbol)

     134
     135 def __call __ (self, source, filename, symbol):
-> 136 codeob = compile (source, filename, symbol, self.flags, 1)

     137 for feature in _features:
     138 if codeob.co_flags & feature.compiler_flag:
TypeError: required field "type_ignores" missing from Module