Results 41 to 50 of about 2,014,608 (301)

On the Uniform Projection and Covering Problems in Descriptive Set Theory Under the Axiom of Constructibility

open access: yesMathematics
The following two consequences of the axiom of constructibility V=L will be established for every n≥3: 1. Every linear Σn1 set is the projection of a uniform planar Πn−11 set. 2.
Vladimir Kanovei, Vassily Lyubetsky
doaj   +1 more source

ON TAXONOMIC INVARIANTS OF MACROPHYTE ALGAE AND THEIR VIOLATION UNDER EXPOSURE TO ANTHROPOGENIC FACTORS

open access: yesИзвестия ТИНРО, 2019
New mathematical methods for determining of multicomponent invariants are developed by detection of their constancy using the measures of percentage similarity. Typification of the descriptive sets is proposed.
B. I. Semkin   +2 more
doaj   +1 more source

Ambiguity of {\omega}-Languages of Turing Machines [PDF]

open access: yesLogical Methods in Computer Science, 2014
An {\omega}-language is a set of infinite words over a finite alphabet X. We consider the class of recursive {\omega}-languages, i.e. the class of {\omega}-languages accepted by Turing machines with a B\"uchi acceptance condition, which is also the class
Olivier Finkel
doaj   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

On effective compactness and sigma-compactness

open access: yes, 2011
Using the Gandy -- Harrington topology and other methods of effective descriptive set theory, we prove several theorems on compact and sigma-compact pointsets. In particular we show that any $\Sigma^1_1$ set $A$ of the Baire space $N^N$ either is covered
A. S. Kechris   +8 more
core   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

open access: yesFEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi   +5 more
wiley   +1 more source

Naive Descriptive Set Theory

open access: yes, 2021
The paper is a naive introduction to descriptive set theory. It is aimed mathematicians without a background in logic. The goal is to provide the basic facts used for applications of descriptive set theory to other areas of mathematics, particularly analysis and dynamical systems.
openaire   +2 more sources

Hierarchies of Effective Descriptive Set Theory [PDF]

open access: yesTransactions of the American Mathematical Society, 1969
1. Introduction and summary. The theory of hierarchies deals with the classification of objects according to some measure of their complexity. Such classifications have been fruitful in several areas of mathematics: analysis (descriptive set theory), recursion theory, and the theory of models.
openaire   +2 more sources

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

open access: yesFEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo   +2 more
wiley   +1 more source

Why Be Funny: The Influence of Social Norms on the Communicative Functions of Humor

open access: yesBehavioral Sciences
Humor is a valued social activity and, as such, should be influenced by social norms. This investigation examined the relationships between the functions of humor and the theory of normative social behavior.
Nathan Miczo, John C. Meyer
doaj   +1 more source

Home - About - Disclaimer - Privacy