{ "_id": "6acb89c9fe5cc25786e916b7", "Package": "polyMatrix", "Version": "0.9.11", "Title": "Infrastructure for Manipulation Polynomial Matrices", "Description": "Implementation of class \"polyMatrix\" for storing a matrix\nof polynomials and implements basic matrix operations;\nincluding a determinant and characteristic polynomial. It is\nbased on the package 'polynom' and uses a lot of its methods to\nimplement matrix operations. This package includes 3 methods of\ntriangularization of polynomial matrices: Extended Euclidean\nalgorithm which is most classical but numerically unstable;\nSylvester algorithm based on LQ decomposition; Interpolation\nalgorithm is based on LQ decomposition and Newton\ninterpolation. Both methods are described in D. Henrion & M.\nSebek, Reliable numerical methods for polynomial matrix\ntriangularization, IEEE Transactions on Automatic Control\n(Volume 44, Issue 3, Mar 1999, Pages 497-508)\n and in Salah Labhalla, Henri Lombardi &\nRoger Marlin, Algorithmes de calcule de la reduction de Hermite\nd'une matrice a coefficients polynomeaux, Theoretical Computer\nScience (Volume 161, Issue 1-2, July 1996, Pages 69-92)\n.", "Type": "Package", "Authors@R": "c(\nperson(\"Tamas\", \"Prohle\", email=\"prohlet@ludens.elte.hu\", role=\"aut\"),\nperson(\"Peter\", \"Prohle\", email=\"prohlep@math.elte.hu\", role=\"aut\"),\nperson(\"Nikolai\", \"Ryzhkov\", email=\"namezys@gmail.com\", role=c(\"aut\", \"cre\")),\nperson(\"Ildiko\", \"Laszlo\", role=\"aut\", comment = c(ORCID = \"0000-0003-2324-8183\")),\nperson(\"Ulas Onat\", \"Alakent\", role=\"ctb\")\n)", "License": "MIT + file LICENSE", "URL": "https://github.com/namezys/polymatrix", "BugReports": "https://github.com/namezys/polymatrix/issues", "Roxygen": "list(markdown = TRUE)", "RoxygenNote": "7.1.1", "Repository": "https://namezys.r-universe.dev", "Date/Publication": "2021-07-11 21:42:44 UTC", "RemoteUrl": "https://github.com/namezys/polymatrix", "RemoteRef": "HEAD", "RemoteSha": "abdde4801218d043e6999a571c32542fae873983", "NeedsCompilation": "no", "Packaged": { "Date": "2026-10-11 13:03:59 UTC", "User": "root" }, "Author": "Tamas Prohle [aut],\nPeter Prohle [aut],\nNikolai Ryzhkov [aut, cre],\nIldiko Laszlo [aut] (ORCID: ),\nUlas Onat Alakent [ctb]", "Maintainer": "Nikolai Ryzhkov ", "_user": "namezys", "_type": "src", "_file": "polyMatrix_0.9.11.tar.gz", "_fileid": "https://r2.ropensci.org/de329ca78d109f21f059125e2707ce2bc5544510fa3a3961ec5d66243640c2b3", "_filesize": 185665, "_sha256": "de329ca78d109f21f059125e2707ce2bc5544510fa3a3961ec5d66243640c2b3", "_expires": "2027-01-19T13:06:15.000Z", "_created": "2026-10-11T13:03:59.000Z", "_published": "2026-10-11T13:06:17.417Z", "_buildurl": 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