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In this paper we establish a criterion on the structure constants of a composition algebra C over Δ(x) to admit an extension of the non-archimedean valuation vp on Δ(x). [ABSTRACT FROM AUTHOR]

Necessary and sufficient conditions for a composition algebra over the rational function field Δ(푥), where Δ is a field of char ≠ 2, to be a division algebra are obtained. [ABSTRACT FROM AUTHOR]

In this paper, we study a class of Jordan algebras called Krein J*-algebras and show that a semisimple Krein J*-algebras is an orthogonal direct sum of simple Krein J*-algebras. A separable simple special Krein J*-algebras is the closure of an increasing union of simple special Krein J*-algebras. [ABSTRACT FROM AUTHOR]

In this paper, Krein J*-triple systems are introduced. It can be shown that any KH*-triple system ([15]) or KJ*-algebra ([16]) can be made into a triple system. We give a few examples of Krein J*-triple system which are also simple. We obtain some structure theorems on some simple Krein J*-triple systems. [ABSTRACT FROM AUTHOR]

Total anomalous pulmonary venous connection is rarely associated with a supramitral ring. This condition should be suspected in any infant having total anomalous pulmonary venous connection with obstruction to the pulmonary venous return. Preoperative echocardiography is usually successful in detecting the lesion. The Shumaker and King repair for total anomalous pulmonary venous connection is most appropriate for such composite lesions as it enables the surgeon to identify the membrane and excise it easily and completely. We report one such case. [Copyright &y& Elsevier]