Ndim_ := 4:
x1_ := xi:
x2_ := theta:
x3_ := phi:
x4_ := t:
sig_ := 2:
complex_ := {}:
g11_ := R^2*(-Pi*xi+Pi*xi*alpha+sin(Pi*xi))*(-2+alpha)*alpha/(-Pi*xi+Pi*xi*alpha-sin(Pi*xi))/(-1+alpha)^2:
g22_ := R^2*(-Pi*xi+Pi*xi*alpha+sin(Pi*xi))^2/(-1+alpha)^2/Pi^2:
g33_ := R^2*sin(theta)^2*(-Pi*xi+Pi*xi*alpha+sin(Pi*xi))^2/(-1+alpha)^2/Pi^2:
g44_ := -(-Pi*xi+Pi*xi*alpha-sin(Pi*xi))/(-Pi*xi+Pi*xi*alpha+sin(Pi*xi)):
constraint_:=[]:
Info_:=`H.Buchdahl,  ApJ. , 147, 3102 (1967), J. Lattimer and M. Prakash, ApJ., 550, 426 (2001) `: