81. Unsolved Problem 25 18Jun-1995 Unsolved problem 25 Start with any positive integer. Each week, foryour edification, we publish a well-known unsolved mathematics problem. http://cage.rug.ac.be/~hvernaev/problems/Proble25.html

18-Jun-1995 Unsolved Problem 25: Start with any positive integer. Halve it if it is even; triple it and add 1 if it is odd. If you keep repeating this procedure, must you eventually reach the number 1? For example, starting with the number 6, we get: 6, 3, 10, 5, 16, 8, 4, 2, 1. Reference: [Gardner 1983] Martin Gardner, Wheels, Life, and Other Mathematical Amusements. W. H. Freeman. New York: 1983. Page 196. Each week, for your edification, we publish a well-known unsolved mathematics problem. These postings are intended to inform you of some of the difficult, yet interesting, problems that mathematicians are investigating. We do not suggest that you tackle these problems, since mathematicians have been unsuccessfully working on these problems for many years. general references previous problem problem archive next problem ... electronic publications

82. NetBSD Problem Report #1848: [dM] Identd Prepends A Space To Usernames NetBSD problem Report 1848. From gnats Mon Dec 18 125046 1995 Received fromCollatz.McRCIM.McGill.EDU by pain.lcs.mit.edu (8.6.12/8.6.9) with ESMTP id http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=1848

83. Lothar F Mackert - ResearchIndex Document Query Daniel www.math.muluebeck.de/workers/potts/paper/illvorkon.ps.Z The 3n+1 CollatzProblem and Functional Equations - Berg, Meinardus (1995) (Correct) (1995 http://citeseer.nj.nec.com/cs?q=Lothar F. Mackert

84. Index Of Examples Development Environment Editing and Debugging MFiles Debugging Example - The CollatzProblem Improving M-File Performance - The Profiler An Example Using the http://www.math.psu.edu/local_doc/matlab/techdoc/demo_example.html

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