Solving and Optimizing Large-Scale Nonlinear Systems R package BB version 2026.1.0 CRAN Task View: NumericalMathematics (https://CRAN.R-project.org/view=NumericalMathematics) CRAN Task View: Optimization (https://CRAN.R-project.org/view=Optimization) Barzilai-Borwein spectral methods for solving nonlinear system of equations, and for optimizing nonlinear objective functions subject to simple constraints. 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("BB"). Software Depends: R (>= 4.0.0) Imports: stats, quadprog Suggests: setRNG, survival, Hmisc, numDeriv Ravi Varadhan <ravi.varadhan@jhu.edu> Comprehensive R Archive Network (CRAN) Ravi Varadhan [aut, cph, cre], Paul Gilbert [aut], Marcos Raydan [ctb] (with co-authors, wrote original algorithms in fortran. These provided some guidance for implementing R code in the BB package.), JM Martinez [ctb] (with co-authors, wrote original algorithms in fortran. These provided some guidance for implementing R code in the BB package.), EG Birgin [ctb] (with co-authors, wrote original algorithms in fortran. These provided some guidance for implementing R code in the BB package.), W LaCruz [ctb] (with co-authors, wrote original algorithms in fortran. These provided some guidance for implementing R code in the BB package.) GPL-3 2026-02-19 application/tgz https://CRAN.R-project.org/package=BB doi:10.32614/CRAN.package.BB