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GALAHAD  

Geometry-Adaptive Lyapunov-Assured Hybrid Optimizer with Softplus Reparameterization and Trust-Region Control
View on CRAN: Click here


Download and install GALAHAD package within the R console
Install from CRAN:
install.packages("GALAHAD")

Install from Github:
library("remotes")
install_github("cran/GALAHAD")

Install by package version:
library("remotes")
install_version("GALAHAD", "2.0.0")



Attach the package and use:
library("GALAHAD")
Maintained by
Richard A. Feiss
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2025-11-07
Latest Update: 2025-11-07
Description:
Implements the GALAHAD algorithm (Geometry-Adaptive 'Lyapunov'-Assured Hybrid Optimizer), combining 'Riemannian' metrics, 'Lyapunov' stability checks, and trust-region methods for stable optimization of mixed-geometry parameters. Designed for biological modeling (germination, dose-response, survival) where rates, concentrations, and unconstrained variables coexist. Developed at the Minnesota Center for Prion Research and Outreach (MNPRO), University of Minnesota. Based on Conn et al. (2000) <doi:10.1137/1.9780898719857>, Amari (1998) <doi:10.1162/089976698300017746>, Beck & Teboulle (2003) <doi:10.1016/S0167-6377(02)00231-6>, Nesterov (2017) <https://www.jstor.org/stable/resrep30722>, and Walne et al. (2020) <doi:10.1002/agg2.20098>.
How to cite:
Richard A. Feiss (2025). GALAHAD: Geometry-Adaptive Lyapunov-Assured Hybrid Optimizer with Softplus Reparameterization and Trust-Region Control. R package version 2.0.0, https://cran.r-project.org/web/packages/GALAHAD. Accessed 04 Oct. 2026.
Previous versions and publish date:
1.0.0 (2025-11-07 15:10), (2026-07-09 08:04)
Other packages that cited GALAHAD R package
View GALAHAD citation profile
Other R packages that GALAHAD depends, imports, suggests or enhances
Complete documentation for GALAHAD
Functions, R codes and Examples using the GALAHAD R package
Full GALAHAD package functions and examples
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