An unambiguous definition of gravitational energy remains one the unresolved issues physics today. This problem is related to non-localization density. In General Relativity, there have been many proposals for defining density, notably those proposed by Einstein, Tolman, Landau and Lifshitz, Papapetrou, Møller, Weinberg. this review, we firstly explored energy–momentum complex in an nth order L...

Abstract This paper introduces a new technique to optimally design the fractional-order Butterworth low-pass filter in complex F -plane. Design stability is assured by incorporating critical phase angle as an inequality constraint. The poles of proposed approximants reside on unit circle stable region improved accuracy suggested scheme compared recently published literature demonstrated. A mixe...

In this paper, we familiarize a class of multivalent functions with respect to symmetric points related the differential operator and discuss impact Janowski on conic regions. Inclusion results, subordination property, coefficient inequalities are obtained. Further, applications our results that extensions those given in earlier works presented as corollaries.