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Shanu Goyal, Pravin Garg and Vishnu Narayan Mishra

Abstract

In this paper, we define new graph operations F-composition F (G)[H], where F (G) be one of the symbols S(G),M(G),Q(G),T(G),Λ(G),Λ[G],D 2(G),D 2[G]. Further, we give some results for the Wiener indices of the these graph operations.

Open access

Vishnu Narayan Mishra, S.K. Paikray, P. Palo, P.N. Samanta, M. Misra and U.K. Misra

Abstract

In this article a new result |A, pm, qn;δ|k on summability of doubly infinite lower triangular matrix has been establised which generalizes a theorem of E. Savas and B.E. Rhoades and subsequently a theorem of Paikray et al. on summability factor of double infinite weighted mean matrix.