Hello,
assuming Selberg's orthonormality conjecture, let's consider bijective maps f$f$ from Selberg's class $\mathcal{S}$ to itself such as:
f$f$ maps a primitive function of S$\mathcal{S}$ to a primitive function of S$\mathcal{S}$,
f$f$ maps a function of degree d$d$ to a function of degree d$d$,
for every F$F$ in S$\mathcal{S}$, n_f(F)=n_F$n_{f(F)}=n_{F}$, where n_F$n_{F}$ is the integer involved in Selberg's conjecture A$A$,
if F=F_{1}^{e_{1}}.F_{2}^{e_{2}}....F_{k}^{{e_{k}}$F=F_{1}^{e_{1}}.F_{2}^{e_{2}}....F_{k}^{e_{k}}$, then f(F)=f(F_{1})^{e_{1}}.f(F_{2})^{e_{2}}....f(F_{k})^{{e_{k}} $f(F)=f(F_{1})^{e_{1}}.f(F_{2})^{e_{2}}....f(F_{k})^{e_{k}}$ (so that f$f$ is "strongly multiplicative"),
if f$f$ verifies the above conditions, then so does the inverse of f$f$.
The set of all such maps makemakes a group for the composition law. I would like to know whether this group is isomorphic to the absolute Galois group of the field of the rational numbers or not.
Thanks in advance.