Symbolic Differentiation R package Deriv version 4.2.0 CRAN Task View: Distributions (https://CRAN.R-project.org/view=Distributions) CRAN Task View: NumericalMathematics (https://CRAN.R-project.org/view=NumericalMathematics) R-based solution for symbolic differentiation. It admits user-defined function as well as function substitution in arguments of functions to be differentiated. Some symbolic simplification is part of the work. Software Imports: methods Suggests: testthat (>= 0.11.0) Serguei Sokol <sokol@insa-toulouse.fr> Comprehensive R Archive Network (CRAN) Andrew Clausen [aut], Serguei Sokol [aut, cre] (ORCID: <https://orcid.org/0000-0002-5674-3327>), Andreas Rappold [ctb] GPL (>= 3) 2025-06-20 application/tgz https://CRAN.R-project.org/package=Deriv doi:10.32614/CRAN.package.Deriv