Quantitative Taxonomy Methods of A.A. Lyubishchev (1943) R package lyubishchev version 0.1.0 Implements the multivariate classification methods of Alexander Alexandrovich Lyubishchev (1890-1972), as described in his 1943 manuscript 'Programma obshchey sistematiki' Lyubishchev (1943) <https://www.zin.ru/animalia/coleoptera/rus/lyubis05.htm> and published in Lubischew (1962) <https://www.jstor.org/stable/2527894>. Provides divergence_coefficient() for measuring separation between groups on continuous features, scatter_ellipse() for fitting covariance ellipses per class, transgression() for detecting ellipse overlap, and classify() for Bayesian posterior classification. These methods predate and are more general than the binary-character similarity coefficients of Sokal and Sneath (1963) that appear in other R packages. Software Suggests: testthat (>= 3.0.0), knitr, rmarkdown, ggplot2 Akzhan Berdeyev <akzhan.berdeyev@gmail.com> Comprehensive R Archive Network (CRAN) Akzhan Berdeyev [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=lyubishchev/LICENSE) 2026-06-22 application/tgz https://CRAN.R-project.org/package=lyubishchev doi:10.32614/CRAN.package.lyubishchev