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# How to write labels in math mode

I am generating a surface plot and adding three axis labels. But, I want to write them in math mode, such as \rho_i or \widetilde{W}. How should I do it?

layout = go.Layout(
title='M/G/1 plot',
scene=dict(
xaxis=dict(
title = 'ζ'
),
yaxis=dict(
title = 'ρ',
),
zaxis=dict(
title = 'W',
)
),
showlegend=False,
)


Dollar signs do not work in Jupyter Notebook.