> Make a point come out of the top of the p, to distinguish it from a rho. Or make it \varrho (ϱ). > Keep the slash in the phi vertical; keep the slash in the

> Make a point come out of the top of the p, to distinguish it from a rho. Or make it \varrho (ϱ). > Keep the slash in the phi vertical; keep the slash in the empty-set symbol slanted. Again, \varphi (U+1D711 which HN doesn’t seem to like) is easier to distinguish. The author silently chose \varepsilon in their TeX, but chose to ignore the rest of the variants. My grammar school math teacher used a very large ascender for the alpha, almost into serif-£-sign-without-the-line-through territory.