home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.math.research
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!ux1.cso.uiuc.edu!news.cso.uiuc.edu!usenet
- From: sutin@helios.ucsc.edu (Brian Sutin)
- Subject: Better than Cauchy-Schwarz
- Nntp-Posting-Host: helios.ucsc.edu
- Message-ID: <18ltblINN8oq@darkstar.UCSC.EDU>
- Sender: Daniel Grayson <dan@math.uiuc.edu>
- X-Submissions-To: sci-math-research@uiuc.edu
- Organization: Lick Observatory UCSC
- X-Administrivia-To: sci-math-research-request@uiuc.edu
- Approved: Daniel Grayson <dan@math.uiuc.edu>
- Date: Wed, 9 Sep 1992 22:20:37 GMT
- Keywords: analysis cauchy-schwarz
- Lines: 28
-
- I have a conjecture which I have been unable to find in the library, prove,
- or discover a conterexample:
-
- There exists some constant C > 0 such that for all non-negative functions
- f(x) on [0,inf] which satisfy the inequality
-
- INT{ f(x) x dx } <= C INT{ f(x) dx } ,
-
- the inequality
-
- INT{ f(x) dx }^2 <= INT{ f(x)^2 dx }
-
- also holds. All integrals are over [0,inf] and converge.
-
- Physically, this means that for any positive distribution of mass f(x), if
- the center of mass is less than C, then the mass is bounded by the L_2 norm.
- The conclusion is similar to Cauchy-Schwarz, but with an interval of
- integration longer than 1.
-
- Actually, the problem I need to solve is much more complicated than this,
- but I am hoping that I can learn something from the method of proof for
- this, since it is very similar.
-
- Brian Sutin sutin@helios.ucsc.edu
- Lick Observatory, UCSC Santa Cruz, CA 95064
- Fred: "May I rescue you?"
- Ginger: "No, thank you. I prefer being in distress."
-
-