Krishnendu Gongopadhyay
Articles written in Proceedings – Mathematical Sciences
Volume 127 Issue 1 February 2017 pp 99-108 Research Article
Palindromic widths of nilpotent and wreath products
Valeriy G Bardakov Oleg V Bryukhanov Krishnendu Gongopadhyay
We prove that the nilpotent product of a set of groups $A_1, \ldots , A_s$ has finite palindromic width if and only if the palindromic widths of $A_i$, $i = 1, \ldots , s$, are finite. We give a new proof that the commutator width of $F_n \wr K$ is infinite, where $F_n$ is a free group of rank $n\geq 2$ and $K$ is a finite group. This result, combining with a result of Fink [9] gives examples of groups with infinite commutator width but finite palindromic width with respect to some generating set.
Volume 128 Issue 3 June 2018 Article ID 0031 Research Article
$z$-Classes in finite groups of conjugate type ($n$, 1)
SHIVAM ARORA KRISHNENDU GONGOPADHYAY
Two elements in a group $G$ are said to be $z$-equivalent or to be in the same $z$-class if their centralizers are conjugate in $G$. In a recent work, Kulkarni
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