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Yupeng Jiang

Publications and source records attributed to Yupeng Jiang.

21 records · Page 2Linked to original sources

Distribution properties of compressing sequences derived from primitive sequences modulo odd prime powers

Let $\underline{a}$ and $\underline{b}$ be primitive sequences over $\mathbb{Z}/(p^e)$ with odd prime $p$ and $e\ge 2$. For certain compressing maps, we consider the distribution properties of compressing sequences of $\underline{a}$ and $\underline{b}$, and prove that $\underline{a}=\underline{b}$ if the compressing sequences are equal at the times $t$ such that $α(t)=k$, where $\underlineα$ is a sequence related to $\underline{a}$. We also discuss the $s$-uniform distribution property of compressing sequences. For some compressing maps, we have that there exist different primitive sequences such that the compressing sequences are $s$-uniform. We also discuss that compressing sequences can be $s$-uniform for how many elements $s$.

cs.IT↗

Exact Covering Systems in Number Fields

It is well known that in an exact covering system in $\mathbb{Z}$, the biggest modulus must be repeated. Very recently, Kim gave an analogous result for certain quadratic fields, and Kim also conjectured that it must hold in any algebraic number field. In this paper, we prove Kim's conjecture. In other words, we prove that exact covering systems in any algebraic number field must have repeated moduli.

math.NT↗

Strong pseudoprimes to the first 9 prime bases

Define $ψ_m$ to be the smallest strong pseudoprime to the first $m$ prime bases. The exact value of $ψ_m$ is known for $1\le m \le 8$. Z. Zhang have found a 19-decimal-digit number $Q_{11}=3825\,12305\,65464\,13051$ which is a strong pseudoprime to the first 11 prime bases and he conjectured that $$ψ_9=ψ_{10}=ψ_{11}=Q_{11}.$$ We prove the conjecture by algorithms.

math.NT↗