We study left invariant conformal Killing–Yano (CKY) 2-forms on Lie groups endowed with a metric. classify all 5-dimensional metric algebras carrying CKY tensors that are obtained as one-dimensional central extension of 4-dimensional an invertible parallel skew-symmetric tensor. On the other hand, we also center dimension greater than one admitting strict tensors. In addition, determine possibl...

The aim of this paper is to generalize results known for the symplectic involutions on K3 surfaces order 3 automorphisms surfaces. In particular, we will explicitly describe action induced lattice $$\Lambda _{K3}$$ , isometric second cohomology group a surface, by automorphism 3; exhibit maps $$\pi _*$$ and ^*$$ in rational quotient map :X\dashrightarrow Y$$ where X surface admitting an $$\sigm...

the aim of the present study was to determine optimal locations to construct sports complexes based on anp model in the center of yazd city. this study was descriptive-analytical and applied and research method was field and library. in order to select an optimal location to establish a sports complex in the center of yazd, six factors were considered. after preparing the information layers, th...