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Projective group representations in quaternionic Hilbert space [PDF]

open access: greenJournal of Mathematical Physics, 1996
We extend the discussion of projective group representations in quaternionic Hilbert space which was given in our recent book. The associativity condition for quaternionic projective representations is formulated in terms of unitary operators and then ...
Stephen L. Adler
core   +6 more sources

On the Ricci tensor of real hypersurfaces of quaternionic projective space [PDF]

open access: goldInternational Journal of Mathematics and Mathematical Sciences, 1996
We study some conditions on the Ricci tensor of real hypersurfaces of quaternionic projective space obtaining among other results an improvement of the main theorem in [9].
Juan De Dios Perez
doaj   +2 more sources

Cycle-parallel real hypersurfaces of quaternionic projective space [PDF]

open access: bronzeTsukuba Journal of Mathematics, 1993
A hypersurface \(M\) of a Riemannian manifold \(A\) is said to be cyclic- parallel, if its shape operator \(A\) satisfies \({\mathfrak S} \langle (\nabla_ X A)Y, Z\rangle = 0\) for all \(X\), \(Y\), \(Z\) tangent to \(M\) where \(\mathfrak S\) denotes the cyclic sum with respect to \(X\), \(Y\), \(Z\). In the paper the following is proved: Let \(N\) be
Juan de Dios Pérez
openalex   +3 more sources

A characterization of pseudo-Einstein real hypersurfaces in a quaternionic projective space [PDF]

open access: bronze, 1996
Let HPn be a quaternionic projective space, n≧3, with metric G of constant quaternionic sectional curvature 4, and let M be a connected real hypersurface of HPn. Let ζ be a unit local normal vector field on M and (I,J,K) a local basis of the quaternionic
Tatsuyoshi Hamada
openalex   +3 more sources

Minimal Δ(2)-Ideal Lagrangian Submanifolds and the Quaternionic Projective Space [PDF]

open access: greenJournal of Geometry and Physics, 2023
We construct an explicit map from a generic minimal $δ(2)$-ideal Lagrangian submanifold of $\mathbb{C}^n$ to the quaternionic projective space $\mathbb{H}P^{n-1}$, whose image is either a point or a minimal totally complex surface. A stronger result is obtained for $n=3$, since the above mentioned map then provides a one-to-one correspondence between ...
Kristof Dekimpe   +2 more
  +7 more sources

Ambient surgery and tangential homotopy quaternionic projective spaces. [PDF]

open access: bronzeTransactions of the American Mathematical Society, 1969
Introduction. In this paper the word manifold will always mean oriented compact C "-manifold. Unless otherwise specified, all homology and cohomology is taken with integral coefficients, and for Mn an n-manifold, [M] E Hn(M, AM) will denote the orientation class of M. A mapf: M-N between n-manifolds is of degree +1 iff*([M])=[N].
Douglas N. Hertz
openalex   +2 more sources

Real hypersurfaces in quaternionic projective space [PDF]

open access: bronzeAnnali di Matematica Pura ed Applicata, 1986
The paper is a systematic study of real hypersurfaces of quaternionic projective spaces via the focal set theory. By using the induced structures on a real hypersurface the authors obtain three classes of real hypersurfaces. Then by means of one of these classes they find an example of a proper quaternion CR-submanifold in the sense of \textit{M ...
Antonio Martínez, Juan de Dios Pérez
openalex   +2 more sources

Spaces which look like quaternionic projective 𝑛-space [PDF]

open access: bronzeTransactions of the American Mathematical Society, 1982
The projective n n -spaces which correspond to the various multiplicative structures on the three sphere are studied. Necessary and sufficient conditions for a projective n n -space to extend to a projective n + 1 n+1 -space are described.
C. A. McGibbon
openalex   +3 more sources

Response to the Comment by G. Emch on projective group representations in quaternionic Hilbert space [PDF]

open access: green, 1996
We discuss the differing definitions of complex and quaternionic projective group representations employed by us and by Emch. The definition of Emch (termed here a strong projective representation) is too restrictive to accommodate quaternionic Hilbert ...
Stephen L. Adler
openalex   +5 more sources

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