R Package sanic: Solving Ax = b Nimbly in C++

sanic is licensed under the GNU General Public License, version 3 or later, except for the third-party code identified below.
Copyright (C) 2026 Nikolas Kuschnig

src/UpperHessenbergEigen.h is adapted from Eigen and Spectra and is licensed under the Mozilla Public License, version 2.0.
Copyright (C) 2008 Gael Guennebaud
Copyright (C) 2010,2012 Jitse Niesen
Copyright (C) 2016-2021 Yixuan Qiu
See the source file for its original copyright and license notice.