I need to have those writing on my $Y$ axis and $X$ axis:
$$\frac{\text{d} \Psi_{\nu}}{\text{d}t}$$ for what concerns the $Y$ axis, and a trivial $t$ on the $X$ axis.
Clearly I know how to write $t$.
What I cannot do is the derivative symbol.
Also, once I wrote the label, it is not saved not the original figure.
For example, this is my code for the moment:
Labeled[
Plot[
{Gamma[1.25]*(1 - MittagLefflerE[0.25, 1, -z^(0.25)])/(z^(0.25)),
Gamma[1.5]*(1 - MittagLefflerE[0.5, 1, -z^(0.5)])/(z^(0.5)),
Gamma[1.75]*(1 - MittagLefflerE[0.75, 1, -z^(0.75)])/(z^(0.75)),
Gamma[2]*(1 - MittagLefflerE[1, 1, -z])/(z)}, {z, 0, 2},
PlotRange -> {0, 1},
PlotStyle ->
{{Black, Bold}, {Black, Dotted, Bold},
{Black, Dashed, Bold}, {Black, DotDashed, Bold}},
AxesLabel -> {"", ""},
LabelStyle -> {FontSize -> 13}],
{t, Subscript[ψ', ν]}, {Bottom, Left}, RotateLabel -> True]
But when I am going to save the file.eps, non of the label are present. The writings are disappeared. How to solve this?