A note on conjugacy problem for finite Sylow subgroups of infinite linear groups

We prove the conjugacy of Sylow $2$-subgroups in pseudofinite ${\mathfrak{M}}_c$ (in particular linear) groups under the assumption that there is at least one finite Sylow $2$-subgroup. We observe the importance of the pseudofiniteness assumption by analyzing an example of a linear group with non-conjugate finite Sylow $2$-subgroups which was constructed by Platonov.