Three-Term Conjugate Gradient for Unconstrained Optimization R package ttcg version 1.0.1 Some accelerated three-term conjugate gradient algorithms implemented purely in R with the same user interface as optim(). The search directions and acceleration scheme are described in Andrei, N. (2013) <doi:10.1016/j.amc.2012.11.097>, Andrei, N. (2013) <doi:10.1016/j.cam.2012.10.002>, and Andrei, N (2015) <doi:10.1007/s11075-014-9845-9>. Line search is done by a hybrid algorithm incorporating the ideas in Oliveia and Takahashi (2020) <doi:10.1145/3423597> and More and Thuente (1994) <doi:10.1145/192115.192132>. Software Depends: R (>= 3.3.0) Imports: numDeriv Suggests: testthat Hao Chi Kiang <hello@hckiang.com> Comprehensive R Archive Network (CRAN) Hao Chi Kiang [cre, aut] GPL-3 2021-10-05 application/tgz https://CRAN.R-project.org/package=ttcg doi:10.32614/CRAN.package.ttcg