To NP, Aleph name , particle physics ?
 User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 Pass Labs This forum is dedicated to Pass Labs discussion.

 Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
 21st February 2003, 12:08 PM #1 akira   diyAudio Member   Join Date: Jan 2002 Location: Paris France To NP, Aleph name , particle physics ? Hi Nelson, Slightly off topic but I was wondering if the name Aleph was coming from the detector in particle physics. Since you have a patent named supersymmetry, it would be a stange coincidence ... Akira
 21st February 2003, 12:17 PM #2 icceman diyAudio Member     Join Date: Jun 2002 Location: Singapore Apparatus for LEP pHysics
 21st February 2003, 12:26 PM #3 massimo   diyAudio Member   Join Date: Dec 2002 Location: Milan, Italy First letter of the Hebrew alphabet, I think...
 21st February 2003, 12:33 PM #4 Christer   diyAudio Member   Join Date: Sep 2002 Location: Sweden No I rather think that Nelson is a mathematician or a theoretical computer scientist. NP is one of the most important classes of computational problems, the problems that can be solved in non-deterministic polynomial time, and the hebrew letter aleph is used to denote cardinality of infinte sets: Aleph_0 is the cardinality of countable infinite sets like the integers and the rationals, Aleph_1 is the cardinality of the reals and then there is an infinite sequence of more and more infinite infinities.
 21st February 2003, 01:54 PM #5 vdi_nenna   diyAudio Member     Join Date: Oct 2000 Location: PA, USA aleph null Aleph-null is the cardinal number of the set of Integers. (There are as many positive integers as there are both positive and negative integers, and that is Aleph-null. Aleph-null plus aleph-null equals aleph-null.) http://www.bsu.edu/web/jcflowers1/rlo/mathnumbers.htm
Christer
diyAudio Member

Join Date: Sep 2002
Location: Sweden
Quote:
 Originally posted by vdi_nenna aleph null 0 with a / through it.
You're probably right. It's a long time since I took discrete math.
So, change to Aleph_1 and Aleph_2, in my previous posting.

 21st February 2003, 02:02 PM #7 vdi_nenna   diyAudio Member     Join Date: Oct 2000 Location: PA, USA I'm no math wiz. I remember it from some math class and always thought it sounded cool. Cool name for a band maybe...
 21st February 2003, 04:50 PM #8 Sch3mat1c   diyAudio Member     Join Date: Jan 2003 Location: Milwaukee, WI Isn't that usually spelled alpha? Tim
Dennis Hui
diyAudio Member

Join Date: Aug 2002
Quote:
 Originally posted by Christer No I rather think that Nelson is a mathematician or a theoretical computer scientist. NP is one of the most important classes of computational problems, the problems that can be solved in non-deterministic polynomial time, and the hebrew letter aleph is used to denote cardinality of infinte sets: Aleph_0 is the cardinality of countable infinite sets like the integers and the rationals, Aleph_1 is the cardinality of the reals and then there is an infinite sequence of more and more infinite infinities.
After hanging around here a while, I now think of NP as initials for
Mr. Pass as opposed to the complexity class.

BTW, the cardinality of the reals is often denoted 'c' (continuum).
The conjecture that c=Aleph_1 actually turned out to be one
of the strangest problems in mathematical logic. (This is
the so-called 'continuum hypothesis'.) Whether this
is true of false (and here's the fun part) turned out to
depend on whether you work in a logic system
which includes something called the Axiom of Choice.

Dennis

 21st February 2003, 05:20 PM #10 xsnailx   diyAudio Member     Join Date: Dec 2002 Location: Poland, Cieszyn i have just done search in goggle and http://www.moonromance.net/storyview.php?storyid=7193 check this one out __________________ Boleslaw Zaras

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Site     Site Announcements     Forum Problems Amplifiers     Solid State     Pass Labs     Tubes / Valves     Chip Amps     Class D     Power Supplies     Headphone Systems Source & Line     Analogue Source     Analog Line Level     Digital Source     Digital Line Level     PC Based Loudspeakers     Multi-Way     Full Range     Subwoofers     Planars & Exotics Live Sound     PA Systems     Instruments and Amps Design & Build     Parts     Equipment & Tools     Construction Tips     Software Tools General Interest     Car Audio     diyAudio.com Articles     Music     Everything Else Member Areas     Introductions     The Lounge     Clubs & Events     In Memoriam The Moving Image Commercial Sector     Swap Meet     Group Buys     The diyAudio Store     Vendor Forums         Vendor's Bazaar         Sonic Craft         Apex Jr         Audio Sector         Acoustic Fun         Chipamp         DIY HiFi Supply         Elekit         Elektor         Mains Cables R Us         Parts Connexion         Planet 10 hifi         Quanghao Audio Design         Siliconray Online Electronics Store         Tubelab     Manufacturers         AKSA         Audio Poutine         Musicaltech         Holton Precision Audio         CSS         Dx Classic Amplifiers         exaDevices         Feastrex         GedLee         Head 'n' HiFi - Walter         Heatsink USA         miniDSP         SITO Audio         Twin Audio         Twisted Pear         Wild Burro Audio

 Similar Threads Thread Thread Starter Forum Replies Last Post gmu Multi-Way 7 18th July 2009 03:34 AM Nappylady Multi-Way 3 13th May 2005 01:29 AM purplepeople Music 1 30th April 2004 05:28 PM Hybrid fourdoor Everything Else 5 2nd April 2004 01:46 PM slackerbob Multi-Way 22 15th November 2003 11:49 AM

 New To Site? Need Help?

All times are GMT. The time now is 11:33 PM.