Results 21 to 30 of about 273,000 (203)
On automorphism groups of Toeplitz subshifts [PDF]
, 2017 In this article we study automorphisms of Toeplitz subshifts. Such groups are abelian and any finitely generated torsion subgroup is finite and cyclic.
Donoso, Sebastián +3 more
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Quantum graphs whose spectra mimic the zeros of the Riemann zeta function [PDF]
, 2014 One of the most famous problems in mathematics is the Riemann hypothesis: that the non-trivial zeros of the Riemann zeta function lie on a line in the complex plane.
Hummel, Quirin +2 more
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Voices in Bioethics, 2018 Paul Root Wolpe is a bioethicist with sprawling interests. He is currently the Raymond F. Schinazi Distinguished Research Chair in Jewish Bioethics at Emory University, and his biography there lists over a dozen areas of expertise ranging from Death and ...
John Zaikowski
doaj +1 more source
Some zn-1 terraces from zn power-sequences, n being an odd prime power [PDF]
, 2007 A terrace for Zm is a particular type of sequence formed from the m elements of Zm. For m odd, many procedures are available for constructing power-sequence terraces for Zm; each terrace of this sort may be partitioned into segments, of which one ...
Anderson, I., Preece, D.A.
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Cyclic distribution and ordering of occurrence of prime and composite numbers
, 2023 Abstract This paper presents a simple analytical method for identifying prime numbers and determining composite numbers. It has been shown that the primes are ordered and all are placed on 96 half-lines. One linear equation and 8 numbers are enough for all calculations.
openaire +1 more source
Infinitely Many Carmichael Numbers in Arithmetic Progressions [PDF]
, 2012 In this paper, we prove that for any $a,M\in \mathbb N$ with $(a,M)=1$, there are infinitely many Carmichael numbers $m$ such that $m\equiv a$ mod $M$Comment: To appear in the Bulletin of the London Mathematical ...
Wright, Thomas
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Practical numbers and the distribution of divisors
, 2015 An integer $n$ is called practical if every $m\le n$ can be written as a sum of distinct divisors of $n$. We show that the number of practical numbers below $x$ is asymptotic to $c x/\log x$, as conjectured by Margenstern.
Weingartner, Andreas
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Influence of the physical environment and conspecific aggression on the spatial arrangement of breeding grey seals [PDF]
, 2007 Understanding the habitat requirements of a species for breeding is essential for its conservation, particularly if the availability of suitable habitat is a limiting factor for population growth.
Harris, Catriona M +2 more
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Verification of the Firoozbakht conjecture for primes up to four quintillion
, 2015 If $p_k$ is the k-th prime, the Firoozbakht conjecture states that the sequence $(p_k)^{1/k}$ is strictly decreasing. We use the table of first-occurrence prime gaps in combination with known bounds for the prime-counting function to verify the ...
Kourbatov, Alexei
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Reduction of Order, Periodicity and Boundedness in Nonlinear, Higher Order Difference Equations
, 2012 We consider the semiconjugate factorization and reduction of order for non-autonomous, nonlinear, higher order difference equations containing linear arguments. These equations have appeared in several mathematical models in biology and economics.
Sedaghat, H.
core +1 more source