Background: Accurately differentiating severe from nonsevere COVID-19 clinical types is critical for the health care system to optimize workflow. Current techniques lack [...]

The pi -weight spectrum for countable regular Frechet-Urysohn spaces is the set of uncountable cardinals that are equal to the pi -weight for some such space. We determin[...]

Let M<inf>X</inf> denote the ideal of meager subsets of a topological space X . We prove that if X is a completely metrizable space without isolated points, t[...]

We count the number and patterns of pairs and tuples of independent events in the following simple random experiment: first a fair coin is flipped and then a fair die is [...]

Subordinators are infinitely divisible distributions on the positive half-line. They are often used as mixing distributions in Poisson mixtures. We show that appropriatel[...]

We show that CH implies every autohomeomorphism of N lifts through the natural projection to an autohomeomorphism of M. This complements a recent result of the second aut[...]

We introduce a Whitney polynomial for hypermaps. For maps, our definition depends only on the underlying graph and coincides with the usual definition, but for general hy[...]

Let denote the ideal of meager subsets of a topological space X. We prove that if X is a completely metrizable space without isolated points, then the smallest cardinalit[...]

In this note we prove several theorems that are related to some results and problems from [6]. We answer two of the main questions that were raised in [6]. First we give [...]

The first proposed invisibility cloaks required materials that are highly anisotropic, spatially inhomogeneous, and that possess a magnetic response. These properties are[...]