Escobar, C. A.; Urrutia, L. F. Invariants of the electromagnetic field. (English) Zbl 1290.78002 J. Math. Phys. 55, No. 3, 032902, 6 p. (2014). MSC: 78A25 PDFBibTeX XMLCite \textit{C. A. Escobar} and \textit{L. F. Urrutia}, J. Math. Phys. 55, No. 3, 032902, 6 p. (2014; Zbl 1290.78002) Full Text: DOI arXiv
Montesinos, Merced; Morales-Técotl, Hugo A.; Urrutia, Luis F.; Vergara, J. David Real sector of the nonminimally coupled scalar field to self-dual gravity. (English) Zbl 0946.83045 J. Math. Phys. 40, No. 3, 1504-1517 (1999). MSC: 83D05 83C05 PDFBibTeX XMLCite \textit{M. Montesinos} et al., J. Math. Phys. 40, No. 3, 1504--1517 (1999; Zbl 0946.83045) Full Text: DOI arXiv
Alfaro, Jorge; Medina, Ricardo; Urrutia, Luis F. Orthogonality relations and supercharacter formulas of U\((m| n)\) representations. (English) Zbl 0910.17002 J. Math. Phys. 38, No. 10, 5319-5349 (1997). Reviewer: J.Van der Jeugt (Gent) MSC: 17B10 81R05 PDFBibTeX XMLCite \textit{J. Alfaro} et al., J. Math. Phys. 38, No. 10, 5319--5349 (1997; Zbl 0910.17002) Full Text: DOI arXiv
Alfaro, Jorge; Medina, Ricardo; Urrutia, Luis F. The Itzykson-Zuber integral for \(U(m| n)\). (English) Zbl 0857.15016 J. Math. Phys. 36, No. 6, 3085-3093 (1995); comment and reply ibid.37, No. 6, 3099-3101 (1996). MSC: 15B52 15A75 22E70 15A90 81V05 81R05 PDFBibTeX XMLCite \textit{J. Alfaro} et al., J. Math. Phys. 36, No. 6, 3085--3093 (1995; Zbl 0857.15016) Full Text: DOI arXiv
Berenstein, D. E.; Urrutia, L. F. The equivalence between the Mandelstam and the Cayley-Hamilton identities. (English) Zbl 0802.15005 J. Math. Phys. 35, No. 4, 1922-1930 (1994). Reviewer: P.Narain (Bombay) MSC: 15A24 PDFBibTeX XMLCite \textit{D. E. Berenstein} and \textit{L. F. Urrutia}, J. Math. Phys. 35, No. 4, 1922--1930 (1994; Zbl 0802.15005) Full Text: DOI arXiv
Urrutia, L. F.; Zanelli, J. Local supersymmetry in nonrelativistic systems. (English) Zbl 0850.70188 J. Math. Phys. 31, No. 9, 2271-2277 (1990). MSC: 70H33 PDFBibTeX XMLCite \textit{L. F. Urrutia} and \textit{J. Zanelli}, J. Math. Phys. 31, No. 9, 2271--2277 (1990; Zbl 0850.70188) Full Text: DOI
Hojman, Sergio; Urrutia, Luis F. On the inverse problem of the calculus of variations. (English) Zbl 0475.70023 J. Math. Phys. 22, 1896-1903 (1981). MSC: 70H03 37J99 49S05 70G10 PDFBibTeX XMLCite \textit{S. Hojman} and \textit{L. F. Urrutia}, J. Math. Phys. 22, 1896--1903 (1981; Zbl 0475.70023) Full Text: DOI