{
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  "Version": "1.6-1",
  "Date": "2026-01-11",
  "Title": "Computational Geometry",
  "Authors@R": "c(person(c(\"Charles\", \"J.\"), \"Geyer\", email = \"geyer@umn.edu\",\nrole = c(\"aut\", \"cre\"), comment = c(ORCID = \"0000-0003-1471-1703\")),\nperson(c(\"Glen\", \"D.\"), \"Meeden\", email = \"gmeeden@umn.edu\", role = \"aut\"),\nperson(\"Komei\", \"Fukuda\", email = \"fukuda@ifor.math.ethz.ch\", role = \"aut\",\ncomment = \"author of cddlib (ver 0.94f), which this package incorporates\"))",
  "SystemRequirements": "GMP (GNU MP bignum library from\n<https://gmplib.org/>)",
  "Description": "R interface to (some of) cddlib\n(<https://github.com/cddlib/cddlib>). Converts back and forth\nbetween two representations of a convex polytope: as solution\nof a set of linear equalities and inequalities and as convex\nhull of set of points and rays. Also does linear programming\nand redundant generator elimination (for example, convex hull\nin n dimensions).  All functions can use exact\ninfinite-precision rational arithmetic.",
  "License": "GPL-2",
  "URL": "https://www.stat.umn.edu/geyer/rcdd/,\nhttps://github.com/cjgeyer/rcdd",
  "NeedsCompilation": "yes",
  "Packaged": {
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    "User": "root"
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  "Author": "Charles J. Geyer [aut, cre] (ORCID:\n<https://orcid.org/0000-0003-1471-1703>), Glen D. Meeden [aut],\nKomei Fukuda [aut] (author of cddlib (ver 0.94f), which this\npackage incorporates)",
  "Maintainer": "Charles J. Geyer <geyer@umn.edu>",
  "Config/pak/sysreqs": "libgmp3-dev",
  "Repository": "https://cran.r-universe.dev",
  "Date/Publication": "2026-01-12 17:41:34 UTC",
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    "author": "Charles J. Geyer <geyer@umn.edu>",
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    "email": "geyer@umn.edu",
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      "role": "Imports"
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  "_usedby": 38,
  "_updates": [
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      "n": 1
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    "name": "cran",
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  "_topics": [
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    "manual.pdf"
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      "date": "2015-07-05"
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      "date": "2017-03-13"
    },
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      "date": "2017-04-19"
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      "date": "2019-04-22"
    },
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      "date": "2021-10-19"
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      "date": "2021-11-18"
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      "date": "2023-04-24"
    },
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      "date": "2023-12-15"
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      "date": "2026-01-12"
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  "_exports": [
    "addHeq",
    "addHin",
    "addVlines",
    "addVpoints",
    "addVrays",
    "allfaces",
    "allIntersect",
    "allUnion",
    "d2q",
    "linearity",
    "lpcdd",
    "makeH",
    "makeV",
    "maximal",
    "q2d",
    "q2q",
    "qabs",
    "qdq",
    "qgram",
    "qinv",
    "qmatmult",
    "qmax",
    "qmin",
    "qmq",
    "qneg",
    "qpq",
    "qprod",
    "qsign",
    "qsum",
    "qxq",
    "redundant",
    "scdd",
    "validcdd",
    "z2q"
  ],
  "_help": [
    {
      "page": "allfaces",
      "title": "All Faces of a Convex Polyhedron",
      "topics": [
        "allfaces"
      ]
    },
    {
      "page": "ArithmeticGMP",
      "title": "GMP Rational Arithmetic",
      "topics": [
        "ArithmeticGMP",
        "qabs",
        "qdq",
        "qinv",
        "qmatmult",
        "qmax",
        "qmin",
        "qmq",
        "qneg",
        "qpq",
        "qprod",
        "qsign",
        "qsum",
        "qxq"
      ]
    },
    {
      "page": "ConvertGMP",
      "title": "Convert Between Real, Integer, and GMP Rational",
      "topics": [
        "ConvertGMP",
        "d2q",
        "q2d",
        "q2q",
        "z2q"
      ]
    },
    {
      "page": "linearity",
      "title": "Find implicit linearities in H-representation and V-representation of convex polyhedron",
      "topics": [
        "linearity"
      ]
    },
    {
      "page": "lpcdd",
      "title": "linear programming with exact arithmetic",
      "topics": [
        "lpcdd"
      ]
    },
    {
      "page": "makeH",
      "title": "make H-representation of convex polyhedron",
      "topics": [
        "addHeq",
        "addHin",
        "makeH"
      ]
    },
    {
      "page": "makeV",
      "title": "make V-representation of convex polyhedron",
      "topics": [
        "addVlines",
        "addVpoints",
        "addVrays",
        "makeV"
      ]
    },
    {
      "page": "qgram",
      "title": "GMP Rational Gram-Schmidt",
      "topics": [
        "qgram"
      ]
    },
    {
      "page": "redundant",
      "title": "Eliminate redundant rows of H-representation and V-representation",
      "topics": [
        "redundant"
      ]
    },
    {
      "page": "scdd",
      "title": "Go between H-representation and V-representation of convex polyhedron",
      "topics": [
        "scdd"
      ]
    },
    {
      "page": "Subset",
      "title": "subsets and maximal sets",
      "topics": [
        "all.intersect",
        "all.union",
        "allIntersect",
        "allUnion",
        "maximal"
      ]
    },
    {
      "page": "validcdd",
      "title": "validate an H-representation or V-representation of convex polyhedron",
      "topics": [
        "validcdd"
      ]
    }
  ],
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  "_sysdeps": [
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      "shlib": "libgmp",
      "package": "libgmp10",
      "headers": "libgmp-dev",
      "source": "gmp",
      "version": "2:6.3.0+dfsg-2ubuntu6.1",
      "name": "gmp",
      "homepage": "https://gmplib.org/",
      "description": "Multiprecision arithmetic library"
    }
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      "source": "vinny.Rnw",
      "filename": "vinny.pdf",
      "title": "Using RCDD",
      "engine": "utils::Sweave",
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      "created": "2014-03-29",
      "modified": "2026-01-12 17:41:34",
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