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Discussions
View:  Topic list, Topic summary Topics 1 - 10 of 10958  Older »

How to find the optimal route, given distances and delivery deadlines? 
  Hello, I have a problem that I can't get my head around. Suppose I were a courier (I'm not, but imagine I were for the sake of this question), and I had six parcels to deliver, each of which had a deadline by which it had to be delivered. For example, consider the following table with d = distance (in miles)... more »
By Yossu  - May 13 - 8 new of 8 messages    

Much ado about nothing 
  -(1/0) = 1/(-0) = 1/0 0 = 1/0 - 1/0 = 1/0 + 1/0 = (1*0 + 1*0)/0*0 = 0/0 1 = 0 + 1 = 0/0 + 1/1 = (0*1 + 0*1)/0*1 = 0/0 1 = 0; x = 0
By William Elliot  - May 8 - 2 new of 2 messages    

Beal Conjecture 
  I tried to find proof of Beal Conjecture, and here is my result: [link] Would be glad of any opinion.
By Jaglaga  - May 4 - 1 new of 1 message    

FOR LATEST MOVIE UPDATED LINKS 
  TOP DOT NET INTERVIEW QUESTIONS& STUDY MATERIAL [link] TOP DATING TIPS TO ENCOURAGE WOMEN FOR DATING [link] FOR ONLY HOT GUYS SEE THIS KIRAN RATHOD LATEST HOT PHOTOSHOOT [link]... more »
By pinki  - Apr 21 - 1 new of 1 message    

v 
  TOP DOT NET INTERVIEW QUESTIONS& STUDY MATERIAL [link] TOP DATING TIPS TO ENCOURAGE WOMEN FOR DATING [link] FOR ONLY HOT GUYS SEE THIS KIRAN RATHOD LATEST HOT PHOTOSHOOT [link]... more »
By pinki  - Apr 21 - 1 new of 1 message    

IBM Ponder This: Garden Hoses 
  Recreational math fans should remember to check IBM's site every month. This month's problem [link] is interesting, though perhaps more a matter of combinatorial fiddling than "mathematics." IBM's puzzle is for 8 pipes. What about 6 or 10? (Odd numbers?)... more »
By James Dow Allen  - Apr 6 - 5 new of 5 messages    

A new game of skill with probabilities 
  Hi, Or I should say "new software" for games of skill and probabilities. I wrote the Java for a set of games with cards. (In the 1970s) It started with "Clock", which deals stacks of 4 cards down on 12 points of a clock, with a 13th in the center, and starts by flipping the top in the center for play. That card stacks underneath... more »
By Markgm  - Mar 31 - 1 new of 1 message    

curvature reversal 
  The radius of a sphere increases to infinity until its surface becomes a perfect plane. Then the curvature reverses and the sphere converges on another center. [link]
By Jon  - Mar 30 - 22 new of 22 messages    

angle subtending arc and chord 
  It looks like the angle subtending arc A and chord B on a circle is, ANGLE = 2*pi*[ (1/0!)(B/A)^0 -(1/1!) (B/A)^1 + (1/2!)(B/A)^2 - (1/3!)(B/A)^3 + ... ] = 2pi*e^(-B/A) since 3 terms into the recursive Maclaurin is always +/- 2pi. I don't have time to check it out. I have to go to work. Anyone interested... more »
By Jon  - Mar 27 - 13 new of 13 messages    

A prime triplet 
  The set of three primes, { 2, 3, 13 }, has the following property. 2 + 3*13 = 41, 3 + 2*13 = 29, 13 + 2*3 = 19, ...are all primes. I found no other such triplet among the first 10000 primes. Can you find one or prove the non-existence of them? Perhaps a mere coincidence, but 2*3*13 = 78 = gcd(W1-1, W2-1),... more »
By Risto Kauppila  - Mar 27 - 6 new of 6 messages    

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