Fantasmagoric Fulleroids Revisited

Reaction of diazocompounds with C70: unprecedented synthesis and characterization of isomeric [5,6]-fulleroids.

The synthesis of a variety of PCBM-type [5,6]-fulleroids and their further highly selective photoisomerization to the respective [6,6]-methanofullerenes is presented. Interestingly, the chemical reactivity of [5,6]-fulleroids reveals the same trend (a > b > c > d) to that observed for pristine C70 (α > β > γ > δ).

On octahedral fulleroids

The discovery of the fullerene has raised an interest in the study of other candidates for modeling of carbon molecules. Motivated by works of P. Fowler, Delgado Friedrichs and Deza, Oh(a, b)-fulleroids were defined as cubic convex polyhedra having only a-gonal and bgonal faces and the symmetry group isomorphic with the full symmetry group of regular octahedron. In this paper we give sufficient...

More icosahedral fulleroids

QUICKSELECT Revisited

We give an overview of the running time analysis of the random divide-and-conquer algorithm FIND or QUICKSELECT. The results concern moments, distribution of FIND’s running time, the limiting distribution, a stochastic bound and the key: a stochastic fixed point equation.

The function ring functors of pointfree topology revisited

This paper establishes two new connections between the familiar function ring functor ${mathfrak R}$ on the category ${bf CRFrm}$ of completely regular frames and the category {bf CR}${mathbf sigma}${bf Frm} of completely regular $sigma$-frames as well as their counterparts for the analogous functor ${mathfrak Z}$ on the category {bf ODFrm} of 0-dimensional frames, given by the integer-valued f...