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1927 Fundamental forms in the projective differential geometry of $m$-parametric families of hypersurfaces of the second order in the $n$-dimensional space
Akitsugu Kawaguchi
Proc. Imp. Acad. 3(6): 310-314 (1927). DOI: 10.3792/pia/1195581848
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Vol.3 • No. 6 • 1927
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