We present approximate formulae describing the changes in neutron star parameters caused by the first-order phase transition to an “exotic” state (pion or kaon condensate, quark matter) resulting in formation of a mixed-phase core. The analytical formulae for the changes in radius, moment of inertia and the amount of energy released during the core-quake are derived using the theory of linear r...

The equations of states (EOSs) inert metals are generally used as pressure scales in a high-pressure experiment. However, the thermodynamic model and method to constrain parameters EOSs these may cause deviations up 7% at 100 GPa room temperature, even higher pressures temperatures. In this study, we provide new approach for obtaining accurate EOS metals. First, use set models, within quasi-Deb...

based on the carnahan and starling hard sphere equation of compressibility, an equation of state has been derived. conditions that must be met by all equations of state are applied in order to obtain attractive term or non - ideal compressibility term of the equation. second virial coefficient and acentric factor arc used in the derivation of the equation of state. in this equation, compressibi...

Fedir M. Sokhats’kyi recently posed four problems concerning parastrophic equivalence between generalized quasigroup functional equations. Sava Krstić in his PhD thesis established a connection between generalized quadratic quasigroup functional equations and connected cubic graphs. We use this connection to solve two of Sokhats’kyi’s problems, giving also complete characterization of parastrop...