Ndim_ :=    4   :
x1_   :=   y   :
x2_   :=   theta   :
x3_   :=   phi   :
x4_   :=   t   :
eta11_   :=   -1   :
eta22_   :=   -1   :
eta33_   :=   -1   :
eta44_   :=   1   :
bd11_   :=   2*l*U(t)^(1/2)   :
bd13_   :=   2*l*U(t)^(1/2)*cos(theta)   :
bd22_   :=   (t^2+l^2)^(1/2)   :
bd33_   :=   ((t^2+l^2)*sin(theta)^2)^(1/2)   :
bd44_   :=   -1/U(t)^(1/2)   :
Info_ := `    Taub-NUT space    `: