# Calculation of four-particle harmonic-oscillator transformation brackets

## Description

Abstract A procedure for precise calculation of the three- and four-particle harmonic-oscillator (HO) transformation brackets is presented. The analytical expressions of the four-particle HO transformation brackets are given. The computer code for the calculations of HO transformation brackets proves to be quick, efficient and produces results with small numerical uncertainties. Title of program: HOTB Catalogue Id: AEFQ_v1_0 Nature of problem Calculation of the three-particle and four-particle harmonic-oscillator transformation brackets. Versions of this program held in the CPC repository in Mendeley Data AEFQ_v1_0; HOTB; 10.1016/j.cpc.2009.10.012 AEFQ_v2_0; HOTB; 10.1016/j.cpc.2011.01.031 AEFQ_v3_0; HOTB_M; 10.1016/j.cpc.2012.09.021 AEFQ_v4_0; HOTB_MPI; 10.1016/j.cpc.2014.06.025 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)