We prove Hölder continuity of weak solutions of the uniformly elliptic and parabolic equations %Δu−∣x∣2+βAu=0,(β≥0), and variable second order term coefficients case A<0,(a_{ij})=Iandβ=0forwhichtheyshowthattheredoesnotexistanyregularpositivesolutionorsingularpositivesolutions,dependingonthesizeof|A|.WhenA>0,β=0and(a_{ij})=I$, P. D. Milman and Y. A. Semenov \cite{Milman2003}\cite{Milman2004} obtain bounds for the heat kernel.