r-cran-squarem 2021.1-1 (amd64 binary) in ubuntu hirsute

 Algorithms for accelerating the convergence of slow,
 monotone sequences from smooth, contraction mapping such as the
 EM algorithm. It can be used to accelerate any smooth, linearly
 convergent acceleration scheme. A tutorial style introduction
 to this package is available in a vignette on the CRAN download
 page or, when the package is loaded in an R session, with
 vignette("SQUAREM").