Nice naming of variables with subscript or superscript, avoiding variable names like phi_jm1_np1 ($\phi_{j-1}^{n+1}$)
In my worksheets I have many variables with subscripted/superscripted names like phi_jm1_np1, where the mathematical notation is simple, $\phi_{j-1}^{n+1}$. Is there a compact notation, or simply a better way, of dealing with subscripts and superscripts using sage?
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