Cayley's theorem

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1 total messages Started by Jean-Pierre Merlet Thu, 19 Nov 1992 08:23

#151

Author: Jean-Pierre Merlet
Date: Thu, 19 Nov 1992 08:23

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I am looking for any reference on the following Cayley's theorem:

"a line such that two points C and D on this line are constrained to lie on curves
of degree nc, nd and of circularity pc, pd, the curves not lying in parallel
planes, generates a ruled surface of degree nc(nd-pd)+nd(nc-pc)"

I am especially interested in the exception case where the curves
lie in parallel planes.

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