The Structure of the ${\cal N}=4$ Supersymmetric Linear $W_{\infty}[\lambda]$ Algebra

TL;DR

This paper derives the full structure of the ${ m N}=4$ supersymmetric linear $W_{ inf}[ ]$ algebra for both zero and nonzero deformation parameters, revealing how it generalizes known algebras and depends on current weights.

Contribution

It provides the complete (anti)commutator relations of the ${ m N}=4$ $W_{ inf}[ ]$ algebra for arbitrary weights and deformation parameters, extending previous partial results.

Findings

Full structure of the algebra at $ =0$ obtained for arbitrary weights.

Complete structure for nonzero $ $ determined within specific weight constraints.

Additional algebraic structures identified outside the main weight region.

Abstract

For the vanishing deformation parameter $\lambda$, the full structure of the (anti)commutator relations in the ${\cal N}=4$ supersymmetric linear $W_{\infty}[\lambda=0]$ algebra is obtained for arbitrary weights $h_1$ and $h_2$ of the currents appearing on the left hand sides in these (anti)commutators. The $w_{1+\infty}$ algebra can be seen from this by taking the vanishing limit of other deformation parameter $q$ with the proper contractions of the currents. For the nonzero $\lambda$, the complete structure of the ${\cal N}=4$ supersymmetric linear $W_{\infty}[\lambda]$ algebra is determined for the arbitrary weight $h_1$ together with the constraint $h_1-3 \leq h_2 \leq h_1+1$. The additional structures on the right hand sides in the (anti)commutators, compared to the above $\lambda=0$ case, arise for the arbitrary weights $h_1$ and $h_2$ where the weight $h_2$ is outside of above region.