  Topological implications of the total generalized electron-flow magnetic
helicity He in electron magnetohydrodynamics(EMHD) are explored. The invariance
of He is shown to imply the invariance of the sum of the linkage of the
magnetic field lines, the linkage of electron-flow vorticity field lines and
the mutual linkage among these two sets of field lines. This result appears to
support a change in the magnetic field topology and hence pave the way for
magnetic reconnection in EMHD via a change in the concomitant electron-flow
vorticity topology.
