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On the rectilinear congruences of Lorentz manifold [R3,(+,+,−)] establishing a mapping between its focal surfaces, preserving the mean curvatures
B. J. PapantoniouVolume:
37
Language:
english
Pages:
10
DOI:
10.1007/bf02844265
Date:
February, 1988
File:
PDF, 346 KB
english, 1988