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A note on Exact solution of SIR and SIS epidemic models
In this article we have successfully obtained an exact solution of a particular case of SIR and SIS epidemic models given by Kermack and Mckendrick [1] for constant population, which are described by
Lie symmetries of the Ricci and energy-momentum tensors
Abstract.Though the Ricci and energy-momentum tensors have the same algebraic symmetries and appear in a similar way in the Einstein equations, in that interchanging them and inverting the
A NOTE ON CLASSIFICATION OF TELEPARALLEL CONFORMAL VECTOR FIELDS IN BIANCHI TYPE I SPACE-TIMES IN THE TELEPARALLEL THEORY OF GRAVITATION
A study of teleparallel conformal vector fields in Bianchi type I space-times in the teleparallel theory of gravitation is given by using the direct integration technique. From the above study it
Do the Ricci and energy-momentum tensors have
The Ricci and energy-momentum tensors have the same algebraic symmetries. In the Einstein equations they look ``dual'' to each other, in that interchanging them and inverting the gravitational