A computationally stable approach of fitting a Gaussian Process (GP) model to a deterministic simulator.

Bindings to GnuPG for working with OpenGPG (RFC4880) cryptographic 
    methods. Includes utilities for public key encryption, creating and verifying
    digital signatures, and managing your local keyring. Some functionality 
    depends on the version of GnuPG that is installed on the system. On Windows
    this package can be used together with 'GPG4Win' which provides a GUI for 
    managing keys and entering passphrases.

Sequential strategies for finding a game equilibrium are proposed in a black-box setting (expensive pay-off evaluations, no derivatives). The algorithm handles noiseless or noisy evaluations. Two acquisition functions are available. Graphical outputs can be generated automatically. V. Picheny, M. Binois, A. Habbal (2018) <doi:10.1007/s10898-018-0688-0>. M. Binois, V. Picheny, P. Taillandier, A. Habbal (2020) <arXiv:1902.06565v2>.

Functions for fitting and doing predictions with
    Gaussian process models using Vecchia's (1988) approximation. 
    Package also includes functions for reordering input locations, 
    finding ordered nearest neighbors (with help from 'FNN' package), 
    grouping operations, and conditional simulations.
    Covariance functions for spatial and spatial-temporal data
    on Euclidean domains and spheres are provided. The original 
    approximation is due to Vecchia (1988) 
    <http://www.jstor.org/stable/2345768>, and the reordering and
    grouping methods are from Guinness (2018) 
    <doi:10.1080/00401706.2018.1437476>.
    Model fitting employs a Fisher scoring algorithm described
    in Guinness (2019) <arXiv:1905.08374>.

Compute the GPIC index as described in Pham (2020)
    <doi:10.35542/osf.io/ajz5v>.

Tools to build and work with bilateral generalized-mean
    price indexes (and by extension quantity indexes), and indexes composed of
    generalized-mean indexes (e.g., superlative quadratic-mean indexes, GEKS).
    Covers the core mathematical machinery for making bilateral price indexes,
    computing price relatives, detecting outliers, and decomposing indexes,
    with wrappers for all common (and many uncommon) index-number
    formulas. Implements and extends many of the methods in
    Balk (2008, ISBN:978-1-107-40496-0),
    von der Lippe (2001, ISBN:3-8246-0638-0), and the
    CPI manual (2020, ISBN:978-1-51354-298-0).