Lie symmetries of systems of second-order linear ordinary differential equations with constant coefficients are exhaustively described over both the complex and real fields. The exact lower and upper ...

Department of Mathematics, School of Secondary Education Science Programme, Cross River State College of Education, Akamkpa, Nigeria. equations are those which relate one on more functions and their ...

Abstract: A classical result in linear system theory is that a causal linear time-varying (LTV) system has a smooth finite dimensional realization if and only if its impulse response exhibits a ...

We present an approach how to obtain solutions of arbitrary linear operator equation for unknown functions. The particular solution can be represented by the infinite operator series (Cyclic Operator ...