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- Path: sparky!uunet!dtix!darwin.sura.net!wupost!gumby!destroyer!ncar!noao!stsci!stallcup
- From: stallcup@stsci.edu (Scott Stallcup)
- Newsgroups: sci.math
- Subject: Solution to a system of nonlinear inequalities
- Keywords: nonlinear systems
- Message-ID: <1992Jul28.220201.27238@stsci.edu>
- Date: 28 Jul 92 22:02:01 GMT
- Sender: stallcup@stsci.edu
- Organization: Space Telescope Science Institute
- Lines: 38
-
-
- Can anyone point me in the direction to a possible solution for
- the following system of nonlinear inequalities ?
-
- Given that P, T, Q, and N are 3D real cartesian vectors
- and r, a, and b are real scalers. N is a unit vector.
-
- N . Q < r cos(a)
-
- T - P Q - P
- --------- . --------- < cos(b)
- //T - P// //Q - P//
-
- r = //Q//
-
-
- r < //T//
-
- r < //P//
-
- 0 < a < Pi/2
-
- 0 < b < Pi/2
-
- The vector Q is the only unknown (but the length (r) of Q is known).
-
- I don't need an actual solution for Q. I only need to know if any
- solutions exist (a boolean).
-
- References to canned software, books, or papers on solving systems
- of nonlinear inequalities would be helpful.
-
-
- ---------------------------------------------------
- Scott Stallcup (AURA), stallcup@stsci.edu
-
- Space Telescope Science Institute
- Johns Hopkins University
-