Results 21 to 30 of about 637,650 (283)

Socioeconomic factors and lifestyle affecting the variability of menstrual cycle characteristics in women from Central Poland

open access: yesAnthropological Review, 2019
Regularity, length of the cycle and duration of menstrual flow are a reflection of women health. The purpose of the research was to assess the relationships between socioeconomic status, cycle length, duration of menses, regularity and dysmenorrhea.
Nieczuja-Dwojacka Joanna   +3 more
doaj   +1 more source

Directional Regularity and Metric Regularity

open access: yesSIAM Journal on Optimization, 2007
For general constraint systems in Banach spaces, we present the directional stability theorem based on the appropriate generalization of the directional regularity condition, suggested earlier in [A. V. Arutyunov and A. F. Izmailov, Math. Oper. Res., 31 (2006), pp. 526-543].
Arutyunov A.V.   +2 more
openaire   +3 more sources

Regular Modules [PDF]

open access: yesProceedings of the American Mathematical Society, 1972
Mathematics Technical ...
openaire   +4 more sources

Maximal Product of Graphs under Vague Environment

open access: yesMathematical and Computational Applications, 2020
Graph models are found everywhere in natural and human made structures, including process dynamics in physical, biological and social systems. The product of graphs are appropriately used in several combinatorial applications and in the formation of ...
Behnaz Sheikh Hoseini   +4 more
doaj   +1 more source

Regular Homomorphisms and Regular Maps

open access: yesEuropean Journal of Combinatorics, 2002
The authors study regular automorphisms of oriented maps. Their main concern is the problem of lifting and projecting map automorphisms. Regular homomorphisms of oriented maps essentially arise from a factorization by a subgroup of automorphisms. In this paper, this kind of map automorphisms is studied in detail.
Malnič, Aleksander   +2 more
openaire   +1 more source

On the sub–diffusion fractional initial value problem with time variable order

open access: yesAdvances in Nonlinear Analysis, 2021
We consider a fractional derivative with order varying in time. Then, we derive for it a Leibniz' inequality and an integration by parts formula. We also study an initial value problem with our time variable order fractional derivative and present a ...
Cuesta Eduardo   +3 more
doaj   +1 more source

Regular Operator Equations: Conditions for Regularity [PDF]

open access: yesProceedings of the American Mathematical Society, 1982
Regular operator equations are causal equations admitting unique solutions and have the property that all of their limiting equations along solutions admit unique solutions. Sufficient conditions which guarantee that an operator equation x = T x x = Tx is regular are given in case T T is
openaire   +2 more sources

On the Duality of Regular and Local Functions

open access: yesMathematics, 2017
In this paper, we relate Poisson’s summation formula to Heisenberg’s uncertainty principle. They both express Fourier dualities within the space of tempered distributions and these dualities are also inverse of each other.
Jens V. Fischer
doaj   +1 more source

A new characterization of fuzzy ideals of semigroups and its applications

open access: yesAutomatika, 2021
In this paper, we develop a new technique for constructing fuzzy ideals of a semigroup. By using generalized Green's relations, fuzzy star ideals are constructed.
Chunhua Li, Baogen Xu, Huawei Huang
doaj   +1 more source

Frequentist coverage of adaptive nonparametric Bayesian credible sets [PDF]

open access: yes, 2015
We investigate the frequentist coverage of Bayesian credible sets in a nonparametric setting. We consider a scale of priors of varying regularity and choose the regularity by an empirical Bayes method.
Szabó, Botond   +2 more
core   +4 more sources

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