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1986 Characterizations of $\mathbf{P}^3$ and hyperquadrics $Q^3$ in $\mathbf{P}^4 $
Iku Nakamura
Proc. Japan Acad. Ser. A Math. Sci. 62(6): 230-233 (1986). DOI: 10.3792/pjaa.62.230
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Vol.62 • No. 6 • 1986
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