arXiv subjects

Firuz Rakhmonov

Publications and source records attributed to Firuz Rakhmonov.

4 recordsLinked to original sources

arXiv2026

Generalized Estermann problem for non-integer powers with almost proportional summands

For $H \ge N^{1-\frac{1}{2c}} \ln^2 N$, where $c$ is a fixed non-integer number satisfying $$ \|c\| \ge 3c\left(2^{[c]+1}-1\right)\frac{\ln \ln N}{\ln N}, \qquad c > \frac{4}{3}\left(1 + \frac{52\ln \ln N}{\ln N}\right), $$ we obtain an asymptotic formula for the number of representations of a sufficiently large integer $N$ in the form $$ p_{1} + p_{2} + [n^{c}] = N, $$ where $p_{1}, p_{2}$ are prime numbers, $n$ is a natural number, and $$ |p_{k} - μ_{k}N| \le H,\qquad k = 1,2,\qquad |[n^{c}] - μ_{3}N| \le H, $$ with $μ_{1}, μ_{2}, μ_{3}$ being fixed positive constants satisfying $μ_{1} + μ_{2} + μ_{3} = 1$. Keywords: Estermann problem, almost proportional summands, short exponential sum with a non-integer power of a natural number. Bibliography: 21 references.

math.NT↗

arXiv2025

Sum of short exponential sums with prime numbers

For sufficiently large integers $K$, $x$, $y$, and $q$ satisfying $K \le y < x$, where $f(u) = αu^n + α_{n-1}u^{n-1} + \ldots + α_1 u$ is a polynomial of degree $n$ with real coefficients, $n$ is a fixed positive integer, $α$ is a real number such that $\left|α- \frac{a}{q}\right| \le \frac{1}{q^2}$, $(a, q) = 1$, $q \ge 1$ and $\mathscr{L} = \ln x$, an estimate of the form $$ \sum_{k=1}^K \left| \sum_{x - y < p \le x} e(kf(p)) \right| \ll K y \left( \frac{1}{q} + \frac{1}{y} + \frac{q}{K y^n} + \frac{1}{K^{2^{n-1}}} \right)^{2^{-n-1}} {\mathscr{L}}^{\frac{n^2}{2^{n+1}}}, $$ is obtained, which represents a strengthening and generalization of the corresponding estimate of I.M.Vinogradov. Keywords: short exponential sum of G.Weyl with prime numbers, uniform distribution modulo one, nontrivial estimate, fractional part. Bibliography: 18 references.

math.NT↗

arXiv2025

On the ternary Estermann problem with almost proportional summands

For $n \geq 3$, an asymptotic formula is derived for the number of representations of a sufficiently large natural number $N$ in the form $p_1+p_2+m^n=N$, where $p_1$, $p_2$ $-$ prime numbers, $m$ $-$ natural number satisfying the conditions $$ \left|p_k-μ_kN\right|\le H, \quad k=1,2,\qquad \left|m^n-μ_3N\right|\le H,\qquad H \ge N^{1-\frac1{n(n-1)}} {\mathscr{L}}^{\frac{2^{n+1}}{n-1}+n-1},$$ for $μ_1+μ_2+μ_3=1, \ \ μ_i >0, \mathscr{L} = \ln{N}. $ Keywords: Estermann problem, almost proportional summands, short exponential sum of G. Weyl, small neighborhood of centers of major arcs. Bibliography: 20 titles.

math.NT↗

arXiv2024

Waring's problem with almost proportional summands

For $n \geq 3$, an asymptotic formula is derived for the number of representations of a sufficiently large natural number $N$ as a sum of $r = 2^n + 1$ summands, each of which is an $n$-th power of natural numbers $x_i$, $i = \overline{1, r}$, satisfying the conditions $$ |x_i^n-μ_iN|\le H,\qquad H\ge N^{1-θ(n,r)+\varepsilon},\qquad θ(n,r)=\frac2{(r+1)(n^2-n)}, $$ where $μ_1, \ldots, μ_r$ are positive fixed numbers, and $μ_1 + \ldots + μ_n = 1$. This result strengthens the theorem of E.M.Wright.

math.NT↗