We develop parametric classes of covariance functions on linear networks and their extension to graphs with Euclidean edges, that is, graphs with edges viewed as line segments or more general sets ...

The aim of this paper is to introduce a topological model of fractals. Self similar fractals will be approached as inverse limit of finite one dimensional topological spaces with alpha continuous ...

Graphs of quadratic functions All quadratic functions have the same type of curved graphs with a line of symmetry.

All quadratic functions have the same type of curved graphs with a line of symmetry. The graph of the quadratic function y = a x 2 + b x + c is a smooth curve with one turning point.

Intestinal cells can change specializations during their lives. The BMP signaling pathway -- an important communication mechanism between cells -- appears to be the driver of these changes ...