Felipe A. Reyes Navarro & Jaime Francisco V. Flores make an important contribution on the use of entropy in Tsallis, on non-linearity front Nasr-Eddine Hamri & Yamina Soula have worked on Non-invertible Maps, Arindam Chakraborty & A. Roy Chowdhury illustrate the Hilbert-Riemann approach for the equations of Non-linear Optics, E. K. El-Shewy, H.G. Abdelwahed & M. A. Elmessary have studied the impervious KdV in the propagation of dust-acoustic waves. Archil Kobakhidze proposes a new and non commutative gravitation theory where the local Lorentz invariance is realized as twisted gauge symmetry, and Lacaze elegantly deals with a classic problem in Optics. P. Samarasekara offers a refined contribution on a lassical problem of condensed matter, and B.G. Sidharth proposes a modification to Dirac equation for ultra relativistic energies. Ervin Goldfain re-opens critically the problem of the breaking symmetry origin in the high energy physics; the Choudhury group (Subha Gaurab Roy, Joydeep Choudhury, Nirmal Kumar Sarkar, Srinivasa Rao Karumuri & Ramendu Bhattacharjee) finds an elegant algebraic approach to the Schrodinger equation for Bound States of Poschl-Teller potential. Beckwith’s re-proposing of Snyder quantum geometry in relation to the recent developing of quantum gravity and the great family of would-be “everything theories” is of great interest. But these are only a few of contributions in this interesting issue.