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We calculate the two-body relativistic boost interaction corrections as well as relativistic one-body and two-body kinetic energy corrections in cluster expansion of energy with $AV_{18}$ and the new charge dependent \emph{Reid}93 potentials within the lowest order constrained variational(LOCV) method. The equation of state of symmetric nuclear matter and pure neutron matter are calculated using the non-relativistic $(H_{NR})$, non-relativistic plus boost interaction corrections $(H^{*}_{NR})$ and $H^{*}_{NR}$ plus kinetic energy corrections $(H^{*}_{R})$ Hamiltonians. The relativistic boost interaction effects reduce the binding energies of symmetric nuclear matter for $AV_{18}$ interaction by $\sim 3\emph{MeV}$.
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