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math-ph2016
Some geometric structures of wave equations on manifolds of `neutral signatures'
Jean-Juste Bashingwa, A. H. Kara
In this paper, we study the symmetries and perform other geometric analyses of the wave equation on some spacetimes {with non diagonal metric which are of neutral signatur…
math.CA2016
The Invariance and Conservation Laws of fourth-order Difference Equations
Mensah Folly-Gbetoula, Abdul Kara
We consider difference equations of order four and determine the one parameter Lie group of transformations (Lie symmetries) that leave them invariant. We introduce a technique for…