The comparative statics properties of qualitatively specified systems are investigated in two cases: the "purely qualitative" case studied by Lancaster and Gorman, and the case in which the ...

Archive for History of Exact Sciences, Vol. 61, No. 6 (November 2007), pp. 553-624 (72 pages) In October 1924, The Physical Review, a relatively minor journal at the time, published a remarkable ...

Bohr’s atomic model was utterly revolutionary when it was presented in 1913 but, although it is still taught in schools, it became obsolete decades ago. However, its creator also developed a much ...

Crystalline materials known as topological insulators conduct surface current perfectly, except when they don't. In two new studies published in the journal Science, researchers explain how these ...

THE experiments of Wood and Ellett 1 on the polarisation of the resonant radiation of mercury suggest that it is necessary to make a rather important modification in the quantum theory. The theory of ...