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- From: kosowsky@hall.harvard.edu (Jeffrey J. Kosowsky)
- Newsgroups: sci.math
- Subject: Re: curves of degree 2
- Message-ID: <KOSOWSKY.92Sep10170123@hall.harvard.edu>
- Date: 10 Sep 92 22:01:23 GMT
- References: <KOSOWSKY.92Sep10133936@hall.harvard.edu>
- Sender: usenet@das.harvard.edu (Network News)
- Organization: Harvard Robotics Lab, Harvard University
- Lines: 17
- In-Reply-To: kosowsky@hall.harvard.edu's message of Thu, 10 Sep 1992 18:39:36 GMT
-
-
- >Given any 5 points in the plane, there exists a curve of degree 2
- >passing thru all 5 points.
-
- >ie: There exist constants a,b,c,d,e,f such that the curve
- > ax^2 + by^2 + cxy + dx +ey +f = 0
- >passes thru all 5 points.
-
- Thanks for all who responded. Of course, as pointed out by several
- posters, this is equivalent to a system of 5 linear equations in 6
- unknowns and hence has at least a 1-dimensional subspace of solutions.
-
- In retrospect, this solutions is "trivial" and I feel quite humbled
- for having wasted much time looking for "deeper", "more sophisticated"
- solutions. Linear algebra triumphs again!
-
- Jeff Kosowsky
-