Hi,
I am new to sympy and I wanted to try it on maxwell's equations examples so
I installed galgebra from git but it doesn't work ? the import is not
found... ANy help ?
regards
Henri
import sys
import sympy.galgebra.GAsympy as GA
import sympy.galgebra.latex_ex as tex
GA.set_main(sys.modules[__name__])
if __name__ == '__main__':
metric = '1 0 0 0,'+\
'0 -1 0 0,'+\
'0 0 -1 0,'+\
'0 0 0 -1'
vars = GA.make_symbols('t x y z')
GA.MV.setup('gamma_t gamma_x gamma_y gamma_z',metric,True,vars)
tex.Format()
I = GA.MV(1,'pseudo')
I.convert_to_blades()
print ('$I$ Pseudo-Scalar')
print ('I =',I)
B = GA.MV('B','vector',fct=True)
E = GA.MV('E','vector',fct=True)
B.set_coef(1,0,0)
E.set_coef(1,0,0)
B *= gamma_t
E *= gamma_t
B.convert_to_blades()
E.convert_to_blades()
J = GA.MV('J','vector',fct=True)
print ('$B$ Magnetic Field Bi-Vector')
print ('B = Bvec gamma_0 =',B)
print ('$E$ Electric Field Bi-Vector')
print ('E = Evec gamma_0 =',E)
F = E+I*B
print ('$E+IB$ Electo-Magnetic Field Bi-Vector')
print ('F = E+IB =',F)
print ('$J$ Four Current')
print ('J =',J)
gradF = F.grad()
gradF.convert_to_blades()
print ('Geometric Derivative of EM Bi-Vector')
tex.MV_format(3)
print ('\\nabla F =',gradF)
print ('All Maxwell Equations are')
print ('\\nabla F = J')
print ('Div $E$ and Curl $H$ Equations')
print ('<\\nabla F>_1 -J =',gradF.project(1)-J,' = 0')
print ('Curl $E$ and Div $B$ equations')
print ('<\\nabla F>_3 =',gradF.project(3),' = 0')
tex.xdvi(filename='Maxwell.tex')
---------------------------------------------------------------------------ImportError
Traceback (most recent call
last)<ipython-input-1-45c89331d82f> in <module>() 1 import sys----> 2
import sympy.galgebra.GAsympy as GA 3 import sympy.galgebra.latex_ex as
tex 4 5 GA.set_main(sys.modules[__name__])
/home/pi/git/sage/local/lib/python2.7/site-packages/sympy/galgebra.py in
<module>()----> 1 raise ImportError("""As of SymPy 1.0 the galgebra module is
maintained separately at https://github.com/brombo/galgebra""";)
ImportError: As of SymPy 1.0 the galgebra module is maintained separately at
https://github.com/brombo/galgebra
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