Frames of subspaces in Hilbert spaces with $W$-metrics

Primitivo Acosta-Humánez, Kevin Esmeral, Osmin Ferrer

If $\left(\h,\langle\cdot,\cdot\rangle\right)$ is a Hilbert space and on it we consider the sesquilinear form $⟨W\cdot ,\cdot ⟩$ so-called $W$-metric, where $W^{*}=W\in…