令 f=p_1(x,z)y^3+p_4(x,z) 是一個NON-DEGENERATE C_3-QUARTICS ，且p_4有4重根，則 f 的HILBERT-KUNZ 函數是(1)13/4*^p^(2n) 若p^(2n)跟4同餘
(2)13/4*p^(2n)-9/4 若不是的話

Let f=p_1(x,z)y^3+p_4(x,z) be a non-degenerate C_3 guartic, and p_4 have order 4 zero. Then the Hilbert-Kunz function of the hypersurface f is
(1)13/4*^p^(2n) if p^(2n)=4*k
(2)13/4*p^(2n)-9/4 otherwise

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