D. Yaqubi

activity

20142026

most citedSome properties of Zumkeller numbers and

k

-layered numbers

6 citations · 6 across the 12 of their papers we have counts for

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Showing 2014Show all

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math.CO2014

Mixed r-stirling numbers of the second kind

Daniel Yaqubi, Madjid Mirzavaziri, Yasin Saeednezhad

The Stirling number of the second kind ${k n}$ counts the number of ways to partition a set of $n$ labeled balls into $k$ non-empty unlabeled cells. As an extension of this, we…

math.CO2014

Some results on ordered and unordered factorization of a positive integers

Daniel Yaqubi, Madjid Mirzavaziri

As a well-known enumerative problem, the number of solutions of the equation $m = m_{1} + ... + m_{k}$ with $m_{1} ⩽ ... ⩽ m_{k}$ in positive integers is $Π(m,k)=\sum_{i=0}^kΠ(m-k,i…