Ndim_ := 4:
x1_ := u:
x2_ := r:
x3_ := theta:
x4_ := phi:
g11_ := -(v(u,r,theta)*exp(2*b(u,r,theta))/r-w(u,r,theta)^2*r^2*exp(2*y(u,r,theta))):
g12_ := -exp(2*b(u,r,theta)):
g13_ := -w(u,r,theta)*r^2*exp(2*y(u,r,theta)):
g33_ := r^2*exp(2*y(u,r,theta)):
g44_ := r^2*sin(theta)^2*exp(-2*y(u,r,theta)):
Info_:=`The Bondi Metric `: