26 citations · 26 across the 2 of their papers we have counts for
2 papers
math.CA2010★ 26 cited
A note on Exact solution of SIR and SIS epidemic models
G. Shabbir, H. Khan, M. A. Sadiq
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, whi…
gr-qc2010
Do the Ricci and energy-momentum tensors have "duality'' in the context of their Lie symmetries?
Hina Khan, Asghar Qadir, K. Saifullah +1
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 g…