Metrics related to oscillator algebras

A Lie algebra is said to be metric if it admits a symmetric, invariant, and non-degenerate bilinear form. The harmonic oscillator algebra, which arises in the quantum mechanical description of oscillator, smallest solvable non-abelian example. This first step countable series algebras that support invariant Lorentzian forms. Generalizing this situation, paper, we arrive at K-algebras as double extensions spaces. aim paper present some structural features, metrics, derivations class explore their possibilities being extended mixed algebras.