Isotropy congruence
From Encyclopedia of Mathematics
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A congruence (cf. Congruence of lines) with indefinite principal surfaces.
How to Cite This Entry:
Isotropy congruence. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Isotropy_congruence&oldid=11640
Isotropy congruence. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Isotropy_congruence&oldid=11640