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On the third Ohtsuki invariant for the Brieskorn–Hamm manifolds

    https://doi.org/10.1142/S0218216521500346Cited by:0 (Source: Crossref)

    We calculate the Ohtsuki invariants λi(M)(i=0,1,2,3) of every Brieskorn–Hamm manifold M which is a rational homology 3-sphere. We denote the order of H1(M;) by H. By the result, we show that the third Ohtsuki invariant λ3(M) of the Brieskorn–Hamm manifolds M with H=1 is negative, and the third Ohtsuki invariant λ3(M) of most Brieskorn–Hamm manifolds M with H2 is positive.

    AMSC: 57M12, 57M27