Duggal, K. L.; Moskal, E. M. Geometry of almost contingent manifold of second class as applied in relativity. (English) Zbl 0546.53017 Tensor, New Ser. 40, 207-214 (1983). Reviewer: J.D.Zund MSC: 53B50 53B30 83C50 83F05 PDF BibTeX XML Cite \textit{K. L. Duggal} and \textit{E. M. Moskal}, Tensor, New Ser. 40, 207--214 (1983; Zbl 0546.53017)
Duggal, K. L. Existence of two Killing vector fields on the space-time of general relativity. (English) Zbl 0415.53020 Tensor, New Ser. 32, 318-322 (1978). MSC: 53B50 83C50 53B30 PDF BibTeX XML Cite \textit{K. L. Duggal}, Tensor, New Ser. 32, 318--322 (1978; Zbl 0415.53020)
Duggal, K. L. On a unified theory of differentiable structures. III: Hypersurfaces. (English) Zbl 0317.53037 Tensor, New Ser. 30, 83-86 (1976). MSC: 53C15 53C40 PDF BibTeX XML Cite \textit{K. L. Duggal}, Tensor, New Ser. 30, 83--86 (1976; Zbl 0317.53037)
Duggal, K. L. On a unified theory of differentiable structures. II: Existence theorems. (English) Zbl 0291.53017 Tensor, New Ser. 29, 209-213 (1975). MSC: 53C15 53C25 PDF BibTeX XML Cite \textit{K. L. Duggal}, Tensor, New Ser. 29, 209--213 (1975; Zbl 0291.53017)
Duggal, K. L. On a unified theory of differentiable structures. I: Almost contingent structures. (English) Zbl 0249.53023 Tensor, New Ser. 25, 303-308 (1972). MSC: 53C15 PDF BibTeX XML Cite \textit{K. L. Duggal}, Tensor, New Ser. 25, 303--308 (1972; Zbl 0249.53023)
Duggal, K. L. On differentiable structures defined by algebraic equations. II: F- connections. (English) Zbl 0236.53038 Tensor, New Ser. 22, 255-260 (1971). MSC: 53C15 PDF BibTeX XML Cite \textit{K. L. Duggal}, Tensor, New Ser. 22, 255--260 (1971; Zbl 0236.53038)
Duggal, K. L. On differentiable structures defined by algebraic equations. I: Nijenhuis tensor. (English) Zbl 0236.53037 Tensor, New Ser. 22, 238-242 (1971). MSC: 53C15 PDF BibTeX XML Cite \textit{K. L. Duggal}, Tensor, New Ser. 22, 238--242 (1971; Zbl 0236.53037)
Duggal, K. L. The operators \(C^ s\) and \(M^ s\) on the \(r-\pi\)-structures. (English) Zbl 0205.26301 Tensor, New Ser. 22, 37-40 (1971). MSC: 53C99 58A99 PDF BibTeX XML Cite \textit{K. L. Duggal}, Tensor, New Ser. 22, 37--40 (1971; Zbl 0205.26301)
Duggal, K. L. Singular Riemannian subordinate to \(r-\pi\)-structures. (English) Zbl 0181.24403 Tensor, New Ser. 21, 265-272 (1970). PDF BibTeX XML Cite \textit{K. L. Duggal}, Tensor, New Ser. 21, 265--272 (1970; Zbl 0181.24403)