Results 21 to 30 of about 793 (200)
Conformally Flat Pseudoprojective Symmetric Spacetimes in fR,G Gravity
Advances in Mathematical Physics, Volume 2022, Issue 1, 2022., 2022 Sufficient conditions on a pseudoprojective symmetric spacetime (PPS)n whose Ricci tensor is of Codazzi type to be either a perfect fluid or Einstein spacetime are given. Also, it is shown that a (PPS)n is Einstein if its Ricci tensor is cyclic parallel. Next, we illustrate that a conformally flat (PPS)n spacetime is of constant curvature.
Uday Chand De +4 more
wiley +1 more source
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 Distributed‐drive electric vehicles constitute an important research direction for the future development of electric vehicles. In this regard, the integrated suspension wheel‐side drive system has considerable development potential because it can address the lack of driving smoothness and the grounding deterioration caused by the excessive unsprung ...
Wen Lu +3 more
wiley +1 more source
A New Class of Contact Pseudo Framed Manifolds with Applications
International Journal of Mathematics and Mathematical Sciences, Volume 2021, Issue 1, 2021., 2021 In this paper, we introduce a new class of contact pseudo framed (CPF)‐manifolds (M, g, f, λ, ξ) by a real tensor field f of type (1,1), a real function λ such that f3 = λ2f where ξ is its characteristic vector field. We prove in our main Theorem 2 that M admits a closed 2‐form Ω if λ is constant.
K. L. Duggal, Luca Vitagliano
wiley +1 more source
On Distance in Some Finite Planes and Graphs Arising from Those Planes
Journal of Mathematics, Volume 2021, Issue 1, 2021., 2021 In this paper, affine and projective graphs are obtained from affine and projective planes of order pr by accepting a line as a path. Some properties of these affine and projective graphs are investigated. Moreover, a definition of distance is given in the affine and projective planes of order pr and, with the help of this distance definition, the ...
I. Dogan, A. Akpinar, Ahmet Sinan Cevik
wiley +1 more source
Certain Class of Almost α‐Cosymplectic Manifolds
Journal of Mathematics, Volume 2021, Issue 1, 2021., 2021 This paper concerned with almost α‐cosymplectic manifolds satisfying conformally flat condition. Firstly, we investigate Kaehler integral submanifolds of almost α‐cosymplectic manifolds. Next, we study conformally flat almost α‐cosymplectic manifolds of dim ≥ 5 whose integral submanifolds are Kaehler.
Sermin Öztürk +2 more
wiley +1 more source
Cubic Extensions of Flag-Transitive Planes, I. Even Order
International Journal of Mathematics and Mathematical Sciences, 2001 The collineation groups of even order translation planes which are cubic extensions of flag-transitive planes are determined.
Yutaka Hiramine +2 more
doaj +1 more source
Edinburgh Mathematical Notes, 1960 If in a complex projective plane a point P , with coordinate vector x , corresponds to a point p *, with coordinate vector x *, under a non-singular collineation, then
openaire +1 more source
On collineation groups of symmetric block designs [PDF]
, 1971 The question of possible collineation groups for a symmetric design with given parameters (v, k, λ) is considered.
Aschbacher, Michael
core +1 more source
International Journal of Mathematics and Mathematical Sciences, 2002 Generalizations of the Johnson parallelisms are given using an index m subgroup of a Pappian central collineation group. The parallelisms, called m-parallelisms, are constructed and the isomorphisms classes are discussed.
Norman L. Johnson, Rolando Pomareda
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Translation planes of odd order and odd dimension
International Journal of Mathematics and Mathematical Sciences, 1979 The author considers one of the main problems in finite translation planes to be the identification of the abstract groups which can act as collineation groups and how those groups can act.
T. G. Ostrom
doaj +1 more source