Assuming neutrinos to be of the Dirac type, little group generators for one-particle states, created off vacuum by field operator, are obtained, both in terms states themselves and creation/annihilation operators. It is shown that these act also as rotation operators Hilbert space providing three types transformations: a helicity flip, standard charge conjugation, combination two, up phases. Th...

In this article we look into characterizing primitive groups in the following way. Given a primitive group we single out a subset of its generators such that these generators alone (the so-called primitive generators) imply the group is primitive. The remaining generators ensure transitivity or comply with specific features of the group. We show that, other than the symmetric and alternating gr...

background: 99mtc is a widely used radioisotope in nuclear medicine centers which is obtained by elution from mo-99/tc-99m generators. usually the generators are either supplied by the iran atomic energy agency or by private companies from foreign countries. in this study we have measured 99mo contamination in 99mtc elute from different generators in a period of one year. materials and methods:...

We discuss the group theory relevant to the ground-state baryons in large N c QCD. For very large representation, the group generators become classical variables. We find the form of the classical generators for the completely symmetric N index representation of SU(m) as N → ∞ and derive an integral formula for the matrix elements of an arbitrary polynomial in the group generators between low-s...

1. Introduction Generators for the groups SL(l; q), Sp(2m; q), U(l; q) and Sz(q) have been available in computer algebra systems for some time 1, 4, 12]. Until recently it has only been practical to work with these groups for small dimensions and small elds. This covered small orthogonal groups (but not in their natural representation) because the orthogonal groups up to dimension 6 are isomorp...