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Prime avoiding numbers form a basis of order 2
Sbornik: Mathematics. 2024. Vol. 215. No. 5. P. 612–633.
Gabdullin M., A. O. Radomskii
For a positive integer $n$ we denote by $F(n)$ the distance of $n$ to the nearest prime number. Using the technique from the recent paper ``Long gaps in sieved sets'' by Ford, Konyagin, Maynard, Pomerance and Tao (J. Eur. Math. Soc., 23:2 (2021), 667--700) we prove that every sufficiently large positive integer $N$ can be represented as a sum $N=n_1+n_2$, where $F(n_{i}) \geq (\log N) (\log\log N)^{1/325565}$ for $i=1,2$. This improves the corresponding `trivial' statement where only the inequality $F(n_{i}) \gg \log N$ is assumed.
Publication based on the results of:
Lebedev V., Journal of Mathematical Analysis and Applications 2026 Vol. 563 No. 2 Article 130787
It is known that for every continuous real-valued
function $f$ on the circle $\mathbb T=\mathbb R/2\pi\mathbb Z$ there exists a
change of variable, i.e., a self-homeomorphism $h$ of $\mathbb T$, such that
the superposition $f\circ h$ is in the Sobolev space $W_2^{1/2}(\mathbb T)$.
We obtain new results on simultaneous improvement of functions by a single
change of variable in relation ...
Added: May 14, 2026
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Petrov I., Автоматика и телемеханика 2026 № 6 С. 82–118
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Added: May 12, 2026
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Novikov R., Sivkin V., Inverse Problems 2026 Vol. 42 No. 4 Article 045009
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the Helmholtz equation in an exterior region in Rd, d ⩾ 2. In this region, we consider a hyperplane X with sufficiently large distance s from the origin in Rd. We give two-point local formulas
for approximate recovering the radiation ...
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Hecht M., Hofmann P., Wicaksono D. et al., IMA Journal of Numerical Analysis 2026 Vol. 00 P. 1–30
Recent advances in Bernstein—Walsh theory have extended Bernstein’s Theorem to multiple dimensions, stating that a multivariate function can be approximated with a geometric rate in a downward-closed polynomial space if and only if it is analytic in a generalized Bernstein polyellipse. To compute approximations of this class of functions—which we term Bos–Levenberg–Trefethen–(BLT) functions—we extend the ...
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Kelbert M., Kalimulina E. Y., Entropy 2026 Vol. 28 Article 536
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weight. For the optimal weighted total loss, defined as the sum of weighted type-I and typeII losses, we prove the logarithmic asymptotic L∗n = exp{−nDwC (P,Q) + o(n)}, n →∞, where Dw
C is the weighted Chernoff information. The single-letter form of the exponent
relies on ...
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Муравьев М. Ю., Annales Mathematiques du Quebec 2025
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Цыганов А. В., Порубов Е. О., Теоретическая и математическая физика 2026 Т. 227 № 2 С. 336–355
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Монахова Э. А., Монахов О. Г., Rzaev E. et al., Прикладная дискретная математика 2026 Т. 71 С. 112–127
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Определены аналитические формулы зависимости этих параметров от диаметра графов семейств ...
Added: May 4, 2026
Dudakov S., Lobachevskii Journal of Mathematics 2025 Vol. 46 No. 12 P. 6092–6102
We study the additive theory of arbitrary figures in linear spaces, that is, the theory of
addition extended to sets of vectors. Our main result is the following: if a linear space is infinite,
then the additive theory of figures admits interpreting second-order arithmetic and, therefore, it has
such or higher degree of undecidability. For countably infinite spaces, ...
Added: May 1, 2026
Taletskii D., / Series arXiv "math". 2026.
A vertex subset of a graph is called a \textit{distance-$k$ independent set} if the distance between any two of its distinct vertices is at least $k + 1$. For all $n,k \geq 1$, we determine the minimum possible number of inclusion-wise maximal distance-$k$ independent sets among all $n$-vertex trees. It equals~$n$ if $n \leq k ...
Added: May 1, 2026
Ovcharenko M., / Series arXiv "math". 2026.
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Blank M., Discrete and Continuous Dynamical Systems 2025 Vol. 45 No. 11 P. 4186–4201
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Radomskii A., Izvestiya. Mathematics 2025 Vol. 89 No. 1 P. 125–139
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Added: October 29, 2021
Kalmynin A. B., Конягин С. В., / Series math "arxiv.org". 2019. No. 1906.09100.
Let S={s1<s2<s3<…} be the sequence of all natural numbers which can be represented as a sum of two squares of integers. For X≥2 we denote by g(X) the largest gap between consecutive elements of S that do not exceed X. We prove that for X→+∞ the lower bound
g(X)≥(390/449−o(1))lnX
holds.
This estimate is twice the recent estimate by R. Dietmann and C. Elsholtz. ...
Added: July 17, 2019
Mikhailovich A., В кн.: Материалы XII Международного семинара "Дискретная математика и её приложения" имени академика О.Б. Лупанова (Москва, МГУ, 20-25 июня 2016г.).: М.: Изд-во механико-математического факультета МГУ, 2016. С. 209–212.
Closed classes of three-valued logic, generated by periodical functions taking values from the set {0,1} are considered. Criteria of basis exitstence and finite basis existence for classes generated by periodical functions with period of the form p^k (p is fixed prime number, k is arbitrary natural number) are obtained. ...
Added: September 1, 2016
Mikhailovich A., / Series math "arxiv.org". 2016.
Closed classes of three-valued logic generated by periodic symmetric funtions that equal $1$ in tuples from $\{1,2\}^n$ and equal $0$ on the rest tuples are considered. Criteria for bases existence and finite bases existence for these classes is obtained. ...
Added: April 15, 2016
Mikhailovich A., В кн.: Материалы X молодежной научной школы по дискретной математике и ее приложениям.: М.: Издательство ИПМ РАН, 2015. С. 51–55.
Closed classes of three-valued logic functions generated by quazi-symmetric functions that take values from the set {0,1} are considered. Criteria of basis existence and finite basis existence have been obtained. ...
Added: April 8, 2016
Mikhailovich A., В кн.: Труды IX Международной конференции "Дискретные модели в теории управляющих систем".: М.: МАКС Пресс, 2015. С. 163–166.
Closed classes of multi-valued logic are observed. Families of closed classes generated by function with special properties are considered. Criteria for basis existence have been obtained for these classes. ...
Added: March 28, 2015
Mikhailovich A., / Series math "arxiv.org". 2015.
Closed classes of three-valued logic generated by symmetric funtions that equal 1 in almost all tuples from {1,2}n and equal 0 on the rest tuples are considered. Criteria for bases existence for these classes is obtained. ...
Added: March 28, 2015
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Closed classes of three-valued logic functions whose generating systems consist of symmetric functions taking all values in the set {0, 1, 2} and taking values 1 and 2 on tuples from {1, 2}^n are consideder. Criteria of existence of a basis and existence of finite basis are obtained for these classes. ...
Added: March 12, 2015