This study presents a new formula for connected n-point functions of the tau-function in the BKP hierarchy, suggesting equivalence with existing formulas.
We present a formula for the connected \(n\)-point functions of a tau-funtion of the BKP hierarchy by embedding BKP hierarchy into KP hierarchy. This formula is different from the one given by Wang and Yang. We prove that these two formulae are equivalent.
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Zhang et al. (2025) studied this question.
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