Beltrán, Carlos E.; Zapata, José A. A discretization of Holst’s action for general relativity. (English) Zbl 1528.83021 Gen. Relativ. Gravitation 55, No. 6, Paper No. 77, 24 p. (2023). MSC: 83C40 05E45 83C45 83C60 65M22 81T27 53C21 PDFBibTeX XMLCite \textit{C. E. Beltrán} and \textit{J. A. Zapata}, Gen. Relativ. Gravitation 55, No. 6, Paper No. 77, 24 p. (2023; Zbl 1528.83021) Full Text: DOI arXiv
Meneses, Claudio; Zapata, José A. Macroscopic observables from the comparison of local reference systems. (English) Zbl 1478.83097 Classical Quantum Gravity 36, No. 23, Article ID 235011, 28 p. (2019). MSC: 83C45 81T25 55R91 83C55 PDFBibTeX XMLCite \textit{C. Meneses} and \textit{J. A. Zapata}, Classical Quantum Gravity 36, No. 23, Article ID 235011, 28 p. (2019; Zbl 1478.83097) Full Text: DOI arXiv
Díaz-Marín, Homero; Zapata, José A. Curvature function and coarse graining. (English) Zbl 1314.81134 J. Math. Phys. 51, No. 12, 122307, 20 p. (2010). MSC: 81T13 55R91 53C29 81Q70 53C07 55R15 PDFBibTeX XMLCite \textit{H. Díaz-Marín} and \textit{J. A. Zapata}, J. Math. Phys. 51, No. 12, 122307, 20 p. (2010; Zbl 1314.81134) Full Text: DOI arXiv
Zapata, José A. Continuum spin foam model for 3d gravity. (English) Zbl 1060.83511 J. Math. Phys. 43, No. 11, 5612-5623 (2002). MSC: 83C27 83C80 PDFBibTeX XMLCite \textit{J. A. Zapata}, J. Math. Phys. 43, No. 11, 5612--5623 (2002; Zbl 1060.83511) Full Text: DOI arXiv Link
Zapata, José A. Combinatorial space from loop quantum gravity. (English) Zbl 0941.83021 Gen. Relativ. Gravitation 30, No. 8, 1229-1245 (1998). MSC: 83C45 83C47 PDFBibTeX XMLCite \textit{J. A. Zapata}, Gen. Relativ. Gravitation 30, No. 8, 1229--1245 (1998; Zbl 0941.83021) Full Text: DOI arXiv
Zapata, José A. A combinatorial approach to diffeomorphism invariant quantum gauge theories. (English) Zbl 0892.58091 J. Math. Phys. 38, No. 11, 5663-5681 (1997). MSC: 58Z05 81T10 81T13 81T25 PDFBibTeX XMLCite \textit{J. A. Zapata}, J. Math. Phys. 38, No. 11, 5663--5681 (1997; Zbl 0892.58091) Full Text: DOI arXiv