Abstract One of the best known approaches to logic agency are ‘stit’ (‘seeing it that’) logics. Often, is not actions an individual agent that bring about a certain outcome but joint set agents, collectively. Collective has received comparatively little attention in ‘stit’. The paper maps out several different forms, senses which particular collectively, can be said outcome, and examines how th...

The nomenclature. development of the Phanerozoic rock units mentioned in the stratigraphic lexicon of Yemen is revised. Forms violating the nomenclature rules are corrected in accordance with the nternational rules of the stratigraphic nomenclature. The concerned forms are categorized as: informally introduced, dropped, named or re-named units, all of these categories are discussed in detail.

The conditions under which, multilinear forms (the symmetric case and the non symmetric case),can be written as a product of linear forms, are considered. Also we generalize a result due to S.Kurepa for 2n-functionals in a group G.