General Monogamy Relations for Multiqubit W-class States in terms of negativity and squared R\'enyi-$\alpha$ entanglement

For multipartite entangled states, entanglement monogamy is an important property. We investigate the monogamy relations for multiqubit generalized W-class states. We present new analytical monogamy inequalities satisfied by the $x$-th power of the dual of convex-roof extended negativity, namely CRENOA, for $x\ge 2$ and $x\le 0$. As for The squared R'enyi-$\alpha$ entanglement (SR$\alpha$E) with $\alpha$ in the region $[(\sqrt 7 - 1)/2,(\sqrt {13} - 1)/2]$,weshowtheupperboundofSR$\alpha$E.