Dan Hoey's posts to sci.math

DateSubject
April 3, 1989Interesting numbers
May 24, 1989mathematics contest
July 20, 1989Clicking on Irregular Shapes (and the four color problem)
July 24, 1989Clicking on Irregular Shapes (and the four color problem)
August 11, 1989proof by contradiction
October 3, 1989A nice problem (solved and extended)
December 21, 1989Rubik's Cube Problem
March 29, 1990Determining whether n numbers are distinct
May 30, 1990exponential diophantine eqn
August 14, 1990Projection question.
August 14, 1990Euclid's proof
December 11, 1990Monty Hall problem: a precise statement
December 20, 1990Paradox (?)
December 20, 1990Boneheadism continued
January 15, 1991The Dodecahedron and the Bugs
January 24, 1991An interesting combinatorical question
February 19, 1991natural mathematics
February 19, 1991monotone function problem
March 12, 1991Palindromic prime question
April 16, 1991Magic square questions
April 18, 1991Self-ref clue puzzles
April 18, 1991Alternate Foundations
April 26, 1991Abuse (was Re: Political Economy of)
May 8, 1991Name this property
July 10, 1991Boxes with same volume and area
July 12, 19910^0, was Re: Definitions, was: *Re: Mathematical Induction?*
July 16, 1991Magic (Was: A value of Pi to 10000 places)
July 16, 1991How about this Travelling Salesman?
July 19, 1991A Diophantine Equation (with a rot13 spoiler)
July 24, 1991A Puzzling Catalyst (Spoiler, but the puzzle continues)
February 11, 1992R E B U K E to the Perpetrator of the Fermat's Last Theorem Poll
February 12, 1992Two squares and NP-completeness
March 12, 1992Special points inside triangles
May 1, 1992rooks in d dimensions
June 11, 1992Square Fibonacci numbers (Summary)
June 17, 1992Tic-Tac-Toe and 4-d magic hyper-cubes
June 27, 1992Fermat's Last Theorem
July 7, 1992Are there any public domain symb.math pkgs?
July 7, 1992Unfoldings of a hypercube
July 14, 1992Chomp
July 17, 1992Unavoidable sets of congruences (was The Erdos kitty)
July 25, 1992Digital Invariants (was Number Theory)
October 1, 19921, 2, 4, 8, 13...where have I seen it before?
October 7, 1992Irrational?
October 16, 1992Results: Unfolding the tesseract
October 29, 1992Infinite Problems
December 16, 1992More lies and abuses from Weiguang Huang (was SIMTEL-20 symbolic...)
January 4, 1993Lunde's problem (least number with n divisors)
January 26, 1993Help me find a "Math class is tough" Barbie
February 10, 1993Big life and blt life (Re: This Week's Finds...)
February 25, 1993"Card-shuffling" algorithms
March 2, 1993Number theory questions
March 3, 1993Number theory questions
May 19, 1993Stamp Folding
June 23, 1993problem in number theory
September 21, 1993FAQ ON LP
September 24, 1993Q: Row,col of element in upper T matrix?
October 4, 1993Careful kill files (was Re: PHYSICS AND MATH EXPLANATION ...)
November 24, 1993MvS erred on Monty Hall. was: dumping on Marilyn vos Savant
December 9, 1993Careful kill files, again (Re: Fermat status)
December 14, 1993Concise proofs (was Re: Elegance in Mathematics)
December 27, 1993unequal halves
March 10, 1994Irrationalism
April 4, 1994[sci.math] Re: Stupid Question
April 8, 1994Not the famous game show problem, but similar.
April 9, 1994Not the famous game show problem, but similar.
April 19, 1994Wu-Yi Hsiang's paper on Kepler's sphere-packing problem
April 21, 1994Weird little number puzzle
May 3, 1994Digital Invariants (was Factorions)
May 19, 1994Is a gross the largest square Fibonacci number?
June 22, 1994Kaprekar's process (was Re: Help! Pattern Driving Me Nuts!)
June 30, 1994Multiplicative Persistence (was: Solve this funny problem...)
July 1, 1994Multiplicative Persistence (was: Solve this funny problem...)
August 26, 1994Numbers of subsets of N closed under addition.
September 3, 1994Vos Savant:0 Math Profs.:1
September 8, 1994The Monty Hall problem
September 8, 1994Tower of Hanoi Formula
September 9, 1994Tower of Hanoi Formula
September 9, 1994Unfolding polyhedra and polytopes (was Re: How many hexominoes...)
September 14, 1994Unfolding polyhedra and polytopes (was Re: How many hexominoes...)
September 30, 1994irrestible forces (was: MARILYN VOS SAVANT ...)
October 20, 1994The sum of the first n squares can not be a perfect square.
November 7, 1994Conway tiling
November 11, 1994A Combinatorics Problem.
November 16, 19940 ^ 0 = ?
November 17, 19940 ^ 0 = ?
November 29, 1994Scientific American and Packing Spheres
December 12, 1994Those darn dice problems
December 20, 1994Cube inside other cube
December 30, 19941995 a very interesting number
January 4, 19951995 a very interesting number
January 4, 1995Number theory question
January 4, 1995Number theory question
January 13, 1995Seeking puzzle solution
January 31, 1995Bizarre problem in number theory
February 3, 1995How many Permutations
February 7, 1995YASM
February 14, 19956^3 rubiks cube
March 5, 19950^0 should equal 1. Right???
March 7, 1995Sequence Problem
March 8, 1995Improper Integrals
March 9, 1995Pi
April 5, 1995Adics
May 9, 1995Combinations. Whoopee.
May 18, 1995Multiperfect Numbers
May 24, 1995pleas ehelp with this "simple" puzzle
July 10, 1995Math involved with Rubik's Cube
July 10, 1995What is 0 to the power 0???
July 10, 1995Cubic equations with real roots
July 19, 1995group theory
September 21, 1995cutting sticks problem (puzzle)
September 27, 1995Exponential misuse
October 8, 1995Game Strategy
November 25, 1995Number sequences problem
November 29, 1995Generating Rubik's Cube
December 3, 1995Putnam spoilers -- Bean Problem
December 18, 1995Presenting Rubik's Cube
January 30, 1996IS THIS AN NP-COMPLETE PROBLEM?
February 23, 1996Verifying whether or not a number is an ALGEBRAIC INTEGER
April 3, 1996Tricky triangle puzzle.
April 4, 19960^0
April 9, 1996Geometry problem.
May 21, 1996[Q:] P, NP, NP-complete, NP-hard; free licks
February 22, 199715-coins game [spoiler]
September 5, 1997Bible codes- Why no psychic prediction??
September 29, 1997Graph Theory Enumeration
December 4, 1997Chess is Dead
February 14, 1998Graph Theory help req.
December 4, 1999xy=z in permutations. Existence from shapes.
December 11, 1999About James Harris
December 17, 1999New (unsolved?) problem
January 6, 2000Y to K puzzle
January 8, 2000Y to K puzzle
January 8, 2000penrose tiles
January 10, 2000Y to K puzzle
January 10, 2000Clive Tooth's newsgroup stalking
January 22, 2000Twin Primes (non-hoax)
January 27, 2000My FLT
January 29, 2000names of groups
January 31, 2000geometric dissection problem with rectangles
February 24, 2000Travelling Salesman Problem
March 2, 2000Solution to four-color problem
March 9, 2000NP-complete problems & algorithms to solve them
March 10, 2000NP-complete problems & algorithms to solve them
March 14, 2000Mr Benschop ad nauseam
March 14, 2000zero (0) knowledge
March 14, 2000Finding the median in 5 elements
March 15, 2000from distancetable to position
March 15, 2000from distancetable to position
March 18, 2000Palindromic Sum Conjecture
March 20, 2000from distancetable to position
March 21, 2000unitary (Egyptian) fractions
June 22, 2000Random coverage of a sphere.
June 23, 2000Random coverage of a sphere.
July 11, 2000Minimization Question
July 12, 2000Periodic functions
July 19, 2000Periodic functions
July 24, 2000geometry/combinatorics/whatever problem
July 25, 2000geometry/combinatorics/whatever problem
August 17, 2000Russian math olympiad problem on lattice points
September 2, 20002*m*n, m^2-n^2, m^2+n^2 ?? Only up to a point.
September 2, 2000Re:Sequence Involving Product of Primes
September 2, 2000Is the empty set a finite set?
October 31, 2000The mathematics of dealing cards
November 22, 2000An Unsolved Problem of Mine #3
November 30, 2000Why mirror invert right and left and not top and bottom?
April 25, 2001Matrix with integer entries
November 23, 2001Equilateral triangle problem
June 15, 2002Quickly find when it gives a Square
July 11, 2002Rationals with Only 1's and 2's in Continued Fraction
July 13, 2002Rationals with Only 1's and 2's in Continued Fraction
July 15, 2002Rationals with Only 1's and 2's in Continued Fraction
July 20, 2002Fun With 3-SAT
July 20, 2002denumerability of the rationals
July 21, 2002Rationals with Only 1's and 2's in Continued Fraction
October 2, 2002Group pairing problem
October 9, 2003ab... = (a*b*...)^n ?
October 11, 2003ab... = (a*b*...)^n ?
January 15, 2004Any news on odd perfect numbers?
March 6, 2004P, NP and coNP
March 16, 2004INTERSECTION OF TWO SQUARES
March 16, 2004INTERSECTION OF TWO SQUARES
April 2, 2004How much is Alice worth to Bob?
April 6, 2004Winning Strategy?
April 15, 2004Continuous prime number function
June 23, 2004Another twin primes conjecture
October 21, 2004Cute little next-to-nothing.
March 18, 2008How many trains it will meet?
March 24, 2008The term "computer algebra system"
March 24, 2008Covering rectangles in 2D
March 25, 2008Covering rectangles in 2D
March 31, 2008Covering rectangles in 2D
May 15, 2008Very hard combinatorics-problem.
August 27, 2008Range of a two-variable polynomial
September 2, 2008Line-Segments In Circle Game
September 6, 2008Question about polynomial roots
September 30, 2008Wind Around Solitaire
September 30, 2008Wind Around Solitaire
October 1, 2008Wind Around Solitaire
October 4, 2008tomic polynomial: CONJECTURE 3
October 5, 2008SAT and NP-Completeness
October 5, 2008Bit-permutation function and Cantor Dust?
October 5, 2008Bit-permutation function and Cantor Dust?
October 6, 2008Bit-permutation function and Cantor Dust?
March 21, 2011On lists of songs and Russell's paradox
March 24, 2011One Through Nine, With Eight Missing, And Two Ones
March 24, 2011One Through Nine, With Eight Missing, And Two Ones
March 29, 2011One Through Nine, With Eight Missing, And Two Ones
March 30, 2011One Through Nine, With Eight Missing, And Two Ones
March 31, 2011One Through Nine, With Eight Missing, And Two Ones
July 29, 2011An cyclic inequality
July 29, 2011An cyclic inequality
August 3, 2011Sum Of Products, Number Of Numbers Game
August 15, 2011Equivalent Spaces