
# Define the symbol for the metric tensor
MetricSymbol := g # Comment in line test

# Define the corrdinate system we are working in
Coordinates := [t, r, theta, phi] 

# Define components of the metric tensor
g_{mu}_{nu} := [[-1 + 2*M/r, 1, 0, 0], [0, 1/(1 - 2*M/r), 0, 0], [0, 0, r**2, 0], [0, 0, 0, r**2*sin(theta)**2]]

RicciSymbol := Ric 
RiemannSymbol := R # Hello

Ric_{a}_{b}

Ric^{a}^{b}