Computation of a large group of interior eigenvalues at the middle spectrum is an important problem for quantum many-body systems. where the level statistics provides characteristic signatures of quantum chaos. We propose an exact numerical method. dual applications of Chebyshev polynomials (DACP). https://www.bekindtopets.com/super-find-Pet-Odor-Exterminator-Air-Freshener-Spray-Hippie-Love-7-oz-deal-zone/