Enhancement of the S = 0 Weak Interactions

0 v 1 2 S ep 1 99 6 Early History of Gauge Theories and Weak Interactions

It took decades until physicists understood that all known fundamental interactions can be described in terms of gauge theories. My historical account begins with Einstein’s general theory of relativity (GR), which is a non-Abelian gauge theory of a special type (see Secs. 3,4). The other gauge theories emerged in a slow and complicated process gradually from GR, and their common geometrical st...

Weak Interactions*

Aspects of weak interactions

Weak interactions, such as those non-covalent interactions that occur in biological systems, are less well characterised than their strong, covalent counterparts. Here, we discuss associations between two or more molecules and consider the effect of interactions with solvent molecules (particularly water) and changes in the internal structure of the associating molecules on binding. We go on to...

Future of Weak Interactions

I am supposed to speak on the future of weak interactions, which is an impossible task. Aside from the constraint of causality, we cannot even pretend to know the future without knowledge of the past. What will be done is often mere analogy to what was done already, unless we stumble on something truly revolutionary, like quantum mechanics or relativity. The periodic table of Mendele’ev was for...

Amenability and Weak Amenability of the Semigroup Algebra l^1 (〖 S〗_T )

Let S be a semigroup with a left multiplier  on S. A new product on S is defined by  related to S and  such that S and the new semigroup ST have the same underlying set as S. It is shown that if  is injective then where, is the extension of  on  Also, we show that if  is bijective then is amenable if and only if is so. Moreover, if  S completely regular, then is weakly amenable.