The block graph of a finite group
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DOI: 10.1007/s11856-021-2192-3
Abstract: This paper studies intersections of principal blocks of a finite group with respect to different primes. We first define the block graph of a finite group $G$, whose vertices are the prime divisors of $|G|$… read more here.
Keywords: block graph; graph finite; group; finite group ... See more keywords
On the second largest distance eigenvalue of a block graph
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DOI: 10.1016/j.laa.2020.01.014
Abstract: Abstract Bapat and Sivasubramanian [4] proved a formula for the inverse of the distance matrix of a block graph. By the result of Bapat and Sivasubramanian, we give an upper bound for the second largest… read more here.
Keywords: block; second largest; distance; block graph ... See more keywords