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1985 Local isometric embedding of two dimensional Riemannian manifolds into $r^3 $ with nonpositive Gaussian curvature
Gen Nakamura
Proc. Japan Acad. Ser. A Math. Sci. 61(7): 211-212 (1985). DOI: 10.3792/pjaa.61.211
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Vol.61 • No. 7 • 1985
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