We study Baire category for downward-closed subsets of 2ω , showing that it behaves better in this context than for general subsets of 2ω . We show that, in the downward-closed context, the ideal of meager sets is prime and b-complete, while the complementary filter is g-complete. We also discuss other cardinal characteristics of this ideal and this filter, and we show that analogous results fo...

A hybrid filter/wrapper feature subset selection algorithm for regression is proposed. First, features are filtered by means of a relevance and redundancy filter using mutual information between regression and target variables. We introduce permutation tests to find statistically significant relevant and redundant features. Second, a wrapper searches for good candidate feature subsets by taking...

A new and inexpensive technique for detecting self interacting dark matter in the form of small grains in bulk matter is proposed. Depending on the interactions with ordinary matter, dark matter grains in bulk matter may be isolated by using a centrifuge and using ordinary matter as a filter. The case of mirror matter interacting with ordinary matter via photon-mirror photon kinetic mixing prov...

Let R be a commutative ring with identity and Mbe a unitary R-module. In this paper we generalize the conceptmultiplicatively closed subset of R and we study some propertiesof these genaralized subsets of M. Among the many results in thispaper, we generalize some well-known theorems about multiplicativelyclosed subsets of R to these generalized subsets of M. Alsowe show that some other well-kno...

With the deployment of wireless sensor networks (WSNs) for environmental monitoring and event surveillance, WSNs can be treated as virtual databases to respond to user queries. It thus becomes more urgent that such databases are able to support complicated queries like skyline queries. Skyline query which is one of popular queries for multi-criteria decision making has received much attention i...

To classify objects, you need to get an image description with so many possible descriptions that it is pointless take each as a separate class.A partial task of this problem divide the into segments. Since there no common method for all cases, we consider methods allow us determine new subsets using already selected subsets.The paper considers main approaches identify subsets. The publication ...

This document provides solutions to the exercises in “Iterated Ultrapowers for the Masses”. 3.3. Exercise. Let U be anM-amenable ultrafilter on the parametricallyM-definable subsets of M . We begin by showing that U2 is a filter on the parametricallyM-definable subsets of M2. Let X,Y ⊆M2 be parametrically M-definable. Let Z = {m ∈M : (X ∩ Y )|m ∈ U}, Z1 = {m ∈M : X|m ∈ U}, Z2 = {m ∈M : Y |m ∈ U...