Mathematical Principle
Mathematical Principle
Can someone save me lookingup time? What's the mathematical principle where a spec. runs through an entire shuffled deck, counts to a thoughtof number from 1 to 10. When he's finished you can tell him the number he started with. It's named after a physicist who's name starts with a K. Yhanks. HARRY LORAYNE.
Re: Mathematical Principle
It's the Kruskal Count, by Martin J. Kruskal...
(Thanks, Harry. I think of you every time I write ellipses...)
(Thanks, Harry. I think of you every time I write ellipses...)
 David Scollnik
 Posts: 284
 Joined: January 19th, 2008, 12:00 pm
 Location: Calgary
Re: Mathematical Principle
"Card Concepts" says Martin D. Kruskal was a Professor of Mathematics at Princeton. (I'm not vouching for the accuracy of Card Concepts, I'm just saying ... )
Harry may well be referring to the Kruskal principle but it didn't sound like it to me, not exactly.
I know of the Kruskal principle as the one where you count down in a deck the value of a card, then you count down again using the card you counted to, and you repeat this until you get as far in the deck as you can go without running out of cards.
The Kruskal principle is that the ending card will usually be the same regardless of the starting card used, as the different possible paths you could have taken tend to converge.
Perhaps this principle has been modified to get the effect HL described, I do not know.
Harry may well be referring to the Kruskal principle but it didn't sound like it to me, not exactly.
I know of the Kruskal principle as the one where you count down in a deck the value of a card, then you count down again using the card you counted to, and you repeat this until you get as far in the deck as you can go without running out of cards.
The Kruskal principle is that the ending card will usually be the same regardless of the starting card used, as the different possible paths you could have taken tend to converge.
Perhaps this principle has been modified to get the effect HL described, I do not know.
 David Scollnik
 Posts: 284
 Joined: January 19th, 2008, 12:00 pm
 Location: Calgary
Re: Mathematical Principle
The way HL described the effect, it sounds more like some variation of the (Alexander F.) Kraus principle to me. But perhaps I misunderstand his post.

 Posts: 96
 Joined: January 17th, 2008, 12:00 pm
 Location: los angeles, ca
Re: Mathematical Principle
Kruskal concept also works for words ... in any passage, in any book!... Check it out, you'll fool yourself!... http://www.google.com/search?hl=en&q=%2 ... tnG=Search
Re: Mathematical Principle
Sadly, Kruskal passed away recently... I believe in the last month.
Re: Mathematical Principle
For those interested in more mathematical 'magic.' This website has some interesting math info. Just before the entry on Martin J. Kruskal (Kruskal Count), there's a link to a PDF article on another such trick from a mathematician. (written by Michael Kleber)
http://home.att.net/~numericana/answer/magic.htm
I was in the Carribean suntanning so I missed the original post...hope it's not too late.
be well all
http://home.att.net/~numericana/answer/magic.htm
I was in the Carribean suntanning so I missed the original post...hope it's not too late.
be well all
The measure of morality is how one treats those least able to defend themselves