Ndim_ := 4:
x1_ := xi:
x2_ := theta:
x3_ := phi:
x4_ := t:
sig_ := 2:
complex_ := {}:
g11_ := R^2*(1+2*Y*xi^2):
g22_ := xi^2*R^2:
g33_ := xi^2*R^2*sin(theta)^2:
g44_ := -(1+Y*xi^2)*(P*sin((1+2*Y*xi^2)^(1/2)-arctan((1+2*Y*xi^2)^(1/2)))+cos((1+2*Y*xi^2)^(1/2)-arctan((1+2*Y*xi^2)^(1/2))))^2:
constraint_:=[Y=1/((-2+alpha)),P=(2*cos(alpha^(1/2)/(-2+alpha)^(1/2))*sin(alpha^(1/2)/(-2+alpha)^(1/2))*alpha-2*cos(alpha^(1/2)/(-2+alpha)^(1/2))*sin(alpha^(1/2)/(-2+alpha)^(1/2))-sqrt((-2+alpha)*alpha))/(2-2*cos(alpha^(1/2)/(-2+alpha)^(1/2))^2-alpha+2*cos(alpha^(1/2)/(-2+alpha)^(1/2))^2*alpha)]:
Info_:=`J. Metese and M. Whitman, Phys. Rev. D., 22, 1270, (1980), M. Finch and J. Skea, Class. Quantum Grav., 6, 467 (1989) `: