Sparse and Dense Matrix Classes and Methods
A rich hierarchy of sparse and dense matrix classes,
	including general, symmetric, triangular, and diagonal matrices
	with numeric, logical, or pattern entries.  Efficient methods for
	operating on such matrices, often wrapping the 'BLAS', 'LAPACK',
	and 'SuiteSparse' libraries.
c(person("Douglas", "Bates", role = "aut",
	         comment = c(ORCID = "0000-0001-8316-9503")),
	  person("Martin", "Maechler", role = c("aut", "cre"),
	         email = "mmaechler+Matrix@gmail.com",
	         comment = c(ORCID = "0000-0002-8685-9910")),
	  person("Mikael", "Jagan", role = "aut",
	         comment = c(ORCID = "0000-0002-3542-2938")),
	  person("Timothy A.", "Davis", role = "ctb",
	         comment = c(ORCID = "0000-0001-7614-6899",
	                     "SuiteSparse libraries, notably CHOLMOD and AMD",
	                     "collaborators listed in dir(pattern=\"^[A-Z]+[.]txt$\", full.names=TRUE, system.file(\"doc\", \"SuiteSparse\", package=\"Matrix\"))")),
	  person("Jens", "Oehlschlägel", role = "ctb",
	         comment = "initial nearPD()"),
	  person("Jason", "Riedy", role = "ctb",
	         comment = c(ORCID = "0000-0002-4345-4200",
	                     "GNU Octave's condest() and onenormest()",
	                     "Copyright: Regents of the University of California")),
	  person("R Core Team", role = "ctb",
	         comment = "base R's matrix implementation"))
grDevices, graphics, grid, lattice, stats, utils
not possible, since we use data/*.R and our S4 classes
Douglas Bates [aut] (<https://orcid.org/0000-0001-8316-9503>),
  Martin Maechler [aut, cre] (<https://orcid.org/0000-0002-8685-9910>),
  Mikael Jagan [aut] (<https://orcid.org/0000-0002-3542-2938>),
  Timothy A. Davis [ctb] (<https://orcid.org/0000-0001-7614-6899>,
    SuiteSparse libraries, notably CHOLMOD and AMD, collaborators
    listed in dir(pattern="^[A-Z]+[.]txt$", full.names=TRUE,
    system.file("doc", "SuiteSparse", package="Matrix"))),
  Jens Oehlschlägel [ctb] (initial nearPD()),
  Jason Riedy [ctb] (<https://orcid.org/0000-0002-4345-4200>, GNU
    Octave's condest() and onenormest(), Copyright: Regents of the
    University of California),
  R Core Team [ctb] (base R's matrix implementation)