in islamic mysticism by annihilation it is meant the removal of any determination, tendency of delimitation to non-delimitation and transformation of multiplicity into unity. the study of historical development of the concept of annihilation can be helpful in understanding and analyzing this fundamental doctrine of mysticism. in early mystical works extant in world of islam, hardly can one find...

Assuming that the enhanced MeV emission from the MeV blazar PKS 0208{ 512 observed by COMPTEL on occasions is due to annihilation in a pair plasma, we estimate parameters of the annihilation region: its size, the number density of particles, and the variability timescale. The values we nd are in accord with our present-dayknowledge of emission mechanisms operating in AGN. The constructed model ...

This article presents an overview of current understanding of the interaction of low-energy positrons with molecules with emphasis on resonances, positron attachment, and annihilation. Measurements of annihilation rates resolved as a function of positron energy reveal the presence of vibrational Feshbach resonances VFRs for many polyatomic molecules. These resonances lead to strong enhancement ...

The total domination number ? t ( G ) of a graph is the cardinality smallest set D ? V such that each vertex has neighbor in . annihilation largest integer k there exist different vertices with degree sum at most m It conjectured ? + 1 holds for every nontrivial connected conjecture been proved graphs minimum least 3, trees, certain tree-like graphs, block and cactus graphs. In main result this...

A system of particles is studied in which the stochastic processes are one-particle type-change (or one-particle diffusion) and multi-particle annihilation. It is shown that, if the annihilation rate tends to zero but the initial values of the average number of the particles tends to infinity, so that the annihilation rate times a certain power of the initial values of the average number of the...

We study, in the ensemble of constant particle number, processes in which a cluster of particles is annihilated and particles are created catalytically in active sites. In this ensemble, particles belonging to a cluster of l particles jump to l distinct active sites. As examples of our prescription, we analyze numerically three nonequilibrium systems that annihilate cluster of particles that ar...

Electron and positron densities for a number of positron binding atoms and ions are used to benchmark methods used to compute positron annihilation rates in solids. The electron and positron densities from ab initio calculations are multiplied by some commonly used enhancement factors and integrated to give the annihilation rate. These are then compared with the close to exact annihilation rate...

Measurements of positron-on-molecule annihilation have established that positrons attach to a variety of molecules via vibrational Feshbach resonances VFRs . These resonances, in turn, result in greatly enhanced positron annihilation rates beyond those expected in simple collisions. A recent paper J. A. Young and C. M. Surko, Phys. Rev. Lett. 99, 133201 2007 described experimental studies and a...