Results 231 to 240 of about 430,965 (263)
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On the existence of generalized complex space forms
Israel Journal of Mathematics, 1989Let \((M,g,J)\) be an almost Hermitian manifold such that its Riemannian curvature tensor has the expression \(R=f\pi_ 1+h\pi_ 2\) where \(f,h\in C^{\infty}\) and \[ \pi_ 1(X,Y)Z = g(X,Z)Y-g(Y,Z)X, \] \[ \pi_ 2(X,Y)Z = g(JX,Z)JY-g(JY,Z)JX+2g(JX,Y)JZ \] for arbitrary vector fields \(X\), \(Y\), \(Z\).
Zbigniew Olszak
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On a Lorentzian Complex Space Form
National Academy Science Letters, 2020The aim of the present paper is to study the theory of general relativity in a Lorentzian Kahler space. In this paper, we have considered the Lorentzian complex space form with constant sectional curvature and proved that a Lorentzian complex space form satisfying Einstein’s field equation is a Ricci semi-symmetric space and the energy–momentum tensor ...
Pankaj Pandey, B. B. Chaturvedi
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The BDD space complexity of different forms of concurrency
Proceedings Second International Conference on Application of Concurrency to System Design, 2002Summary: The automated verification of concurrent systems by model checking is often confronted with the state space explosion problem. A widely adopted method to tackle this problem is to use Binary Decision Diagrams (BDDs) for representing systems and state spaces implicitly.
Michael Baldamus, Klaus Schneider 0001
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Curvature of Hopf Hypersurfaces in a Complex Space Form
Results in Mathematics, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Cho, Jong Taek, Kimura, Makoto
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Certain submanifolds of complex space forms
São Paulo Journal of Mathematical Sciences, 2020zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mirjana Djorić, Masafumi Okumura
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On Ruled Real Hypersurfaces in Complex Space Forms
Geometriae Dedicata, 1999An immersed real hypersurface of a complex space form \(M_\kappa^{m+1}\) of constant holomorphic sectional curvature \(\kappa\) is said to be ruled if it is foliated by totally geodesic complex hypersurfaces of \(M_\kappa^{m+1}\). Such hypersurfaces can be parametrized by maps of the form \(f:\mathbb{R}\times M_\kappa^m\to M^{m+1}_\kappa\) for which ...
Lohnherr, Michael, Reckziegel, Helmut
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On real hypersurfaces in a complex space form
Mathematical Journal of Okayama University, 1998Let \(M(c)\) be a Kähler manifold of non-vanishing constant holomorphic sectional curvature \(c\) and with real dimension \(2n\geq 6\). Furthermore, let \(P\) be a real hypersurface, \(N\) a local unit normal vector field and \(R\) the Riemann curvature tensor of \(P\).
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Isotropic Immersions with Low Codimension of Complex Space Forms into Real Space Forms
Canadian Mathematical Bulletin, 2004AbstractThe main purpose of this paper is to determine isotropic immersions of complex space forms into real space forms with low codimension. This is an improvement of a result of S. Maeda.
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Complex submanifolds of indefinite complex space forms
Proceedings of the American Mathematical SocietyIn this short paper, we derive a new result on Umehara algebra. As a consequence, we prove that an indefinite complex hyperbolic space and an indefinite complex projective space do not share a common complex submanifold with induced metrics, answering a question raised in Cheng et al.
Cheng, Xiaoliang +3 more
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Families of differential forms on complex spaces
2003Summary: On every reduced complex space \(X\) we construct a family of complexes of soft sheaves \(\Omega_X\); each of them is a resolution of the constant sheaf \(\mathbb{C}_X\) and induces the ordinary De Rham complex of differential forms on a dense open analytic subset of \(X\). The construction is functorial (in a suitable sense). Moreover each of
ANCONA, VINCENZO, B. GAVEAU
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