  In the case of nonzero fermion mass, within a range of Ansatze for the full
fermion-boson vertex, we show that Dyson-Schwinger equation for the fermion
propagator in QED3 has two qualitatively distinct dynamical chiral symmetry
breaking solutions. As the fermion mass increases and reaches to a critical
value mc, one solution disappears, and the dependence of mc on the number of
fermion flavors is also given.
