Computable model theory investigates the algorithmic aspects of model theoretic structures, aiming to delineate the boundaries between the computable and non-computable within various algebraic and ...

It is shown that the extension functor defined on the category $\mathcal{L}$ of locally compact abelian groups is right-exact. Actually $\operatorname{Ext}^n$ is ...

A new kind of abelian p-group, called an A-group, is introduced. This class contains the totally projective groups and Warfield's S-groups as special cases. It also contains the N-groups recently ...

Phase shift: Images showing interference patterns (top) and a “Wilson loop” (bottom) were produced by the researchers to confirm the presence of non-Abelian gauge fields. (Courtesy: MIT) For the first ...