Derivative-Based Optimization with User-Defined Convergence Criteria R package optimflex version 0.1.6 CRAN Task View: Optimization (https://CRAN.R-project.org/view=Optimization) Provides a derivative-based optimization framework that allows users to combine eight convergence criteria. Unlike standard optimization functions, this package includes a built-in mechanism to verify the positive definiteness of the Hessian matrix at the point of convergence. This additional check helps prevent the solver from falsely identifying non-optimal solutions, such as saddle points, as valid minima. Software Imports: numDeriv, utils Suggests: knitr, rmarkdown, testthat (>= 3.0.0) Eunseong Cho <bene@kw.ac.kr> Comprehensive R Archive Network (CRAN) Eunseong Cho [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=optimflex/LICENSE) 2026-04-11 application/tgz https://CRAN.R-project.org/package=optimflex doi:10.32614/CRAN.package.optimflex