Acta Mathematica Vietnamica
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A Note on Symmetric Elements of Division Rings with Involution
Vo Hoang Minh Thupp. 495-502
Abstract
Let D be a division ring with involution ⋆ and S the set of all symmetric elements of D. Assume that the center F of D is uncountable and K is a division subring of D containing F. The main aim of this note is to show that S is right algebraic over K if and only if so is D. This result allows us to construct an example of division rings K ⊂ D such that D is right algebraic but not left algebraic over K.