Edge reversal splits the Hashimoto operator into blocks whose Schur complement isolates a correction determinant and mixed-sector shadows that serve as new invariants separating certain cospectral irregular graphs.
Hashimoto, Zeta functions of finite graphs and representations ofp-adic groups, inAu- tomorphic Forms and Geometry of Arithmetic Varieties, Adv
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Beyond Bass Collapse: New Irregular Edge-Space Invariants in Ihara Theory
Edge reversal splits the Hashimoto operator into blocks whose Schur complement isolates a correction determinant and mixed-sector shadows that serve as new invariants separating certain cospectral irregular graphs.