Pendent-path transfer conjecture for adjacent attachment vertices

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Let GG be a connected graph, and let uu and vv be adjacent vertices of GG with degree at least 22. Let Gp,q(u,v)G_{p,q}(u,v) denote the graph obtained by attaching pendent paths of lengths pp and qq at uu and vv, respectively, and let ρα\rho_{\alpha} be the alpha-index. Pendent-path transfer conjecture. If α∈[0,1)\alpha\in[0,1), q≥1q\geq1, and p≥q+2p\geq q+2, then

ρα(Gp,q(u,v))<ρα(Gp−1,q+1(u,v)).\rho_{\alpha}\left(G_{p,q}(u,v)\right)<\rho_{\alpha}\left(G_{p-1,q+1}(u,v)\right).

This is posed as a related open problem after the first conjecture. The source gives no resolution for this adjacent-vertex version.

References

Primary source

Vladimir Nikiforov and Oscar Rojo, “On the α-index of graphs with pendent paths”, arXiv:1710.10484 (2017).

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