## How many steps still left to x*?

Abstract The high speed of $$x_{k}\rightarrow x^\ast\in{\mathbb R}$$ is usually measured using the C-, Q- or R-orders: \tag{$C$} \lim \frac…

## A survey on the high convergence orders and computational convergence orders of sequences

Abstract Let $$x_k\rightarrow x^\ast\in{\mathbb R}^N$$; denote the errors by $$e_k: = \|x^\ast – x_k\|$$ and the quotient factors…

## Diffusion in random velocity fields with applications to contaminant transport in groundwater

AbstractThe process of diffusion in a random velocity field is the mathematical object underlying currently used stochastic models of transport in…