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ON CONCIRCULAR Q-RECURRENT SPACES

机译:递归的Q-递归空间

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Tachibana introduced a tensor field S on an n-dimensional Riemannian space M~n defined by S_(ijk)~h = R_(ijk)~h - (R(δ_k~h g_(ij) - δ_j~h g_(ik))/(n(n-1)) gives g~(hk) S_(hijk) = G_(ij) which is, ...(1.1) G_(ij) = R_(ij) - R (g_(ij)) ... (1.2) measure the deviation of M~n from a space of constant curvature and from an Einstein space respectively. Let g_(ij), R_(hijk) and R_(ij) denote the local components of the metric tensor g, the curvature tensor and Ricci tensor respectively and let R denote the scalar curvature. We know consider a Riemannian space M~n whose concircular curvature tensor S_(hijk) is S_(ijk,l)~h = K_l S_(ijk)~h ...(1.3) for a non-zero vector K_l. We shall call the Riemannian space satisfying (1.3) is a concircular recurrent space. The recurrent space and concircular recurrent space both will be denoted by K_n~* and SK_n~* respectively. The purpose of the present paper is to define and study concircular q-recurrent space and several theorems have been investigated. We have also established relations which hold amongst the known recurrent spaces.
机译:Tachibana在由S_(ijk)〜h = R_(ijk)〜h-(R(δ_k〜h g_(ij)-δ_j〜h g_(ik))定义的n维黎曼空间M〜n上引入了张量场S )/(n(n-1))给出g〜(hk)S_(hijk)= G_(ij),即...(1.1)G_(ij)= R_(ij)-R(g_(ij) )/ n ...(1.2)分别测量M〜n与曲率恒定的空间和爱因斯坦空间的偏差,令g_(ij),R_(hijk)和R_(ij)表示局部分量。度量张量g,曲率张量和Ricci张量,分别用R表示标量曲率我们知道考虑黎曼空间M〜n,其曲率张量S_(hijk)为S_(ijk,l)〜h = K_l S_(ijk) )〜h ...(1.3)对于一个非零向量K_1,我们称满足(1.3)的Riemannian空间是一个循环递归空间,循环空间和循环递归空间都将用K_n〜*和SK_n表示〜*。本文的目的是定义和研究圆形q-递归空间,并且已经研究了几个定理tig。我们还建立了已知循环空间之间的关系。

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