On Jacobian group and complexity of I-graph I(n,k,l) through Chebyshev polynomials
arXiv:1703.07058
Abstract
We consider a family of I-graphs I(n,k,l), which is a generalization of the class of generalized Petersen graphs. In the present paper, we provide a new method for counting Jacobian group of the I-graph I(n,k,l). We show that the minimum number of generators of Jac(I(n,k,l)) is at least two and at most 2k + 2l - 1. Also, we obtain a closed formula for the number of spanning trees of I(n,k,l) in terms of Chebyshev polynomials. We investigate some arithmetical properties of this number and its asymptotic behaviour.
17. arXiv admin note: substantial text overlap with arXiv:1612.03372