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Article #8385

Re: the terminus technicus "PSEUDO-Random"

#8385
From: silber
Date: Thu, 01 Jun 1989 16:20
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I am not a statistician, however, I don't think my posting
re: random vs. "pseudo-random" was at odds with the posting by
hrubin@l.cc.purdue.edu. who replied:

 >If there is a computable algorithm producing the sequence, it is NOT   
 >random.  This algorithm could even have inputs of preceding physical   
 >variables.  The test that the sequence is produced by the algorithm    
 >is the proof that the sequence is NOT random.  

  A "Pseudo-random" sequence is UNDERSTOOD by us to be non-random because 
 we KNOW an algorithm  which can produce it.  However, we often use 
 pseudo-random sequences in simulations and we justify this on the basis 
 of computable attributes of the sequence with which we quantify a
 comparison of the "pseudo-random" sequence (generated by us by
 algorithmic iteration over "n") with a "random" sequence (of events over
 time, "t").  Whether an actual physical process
 is "deterministic" or "non-deterministic", "algorithmic", or "non-algorithmic"
 is not only a question of its "nature" , but also of our understanding.
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!husc6!rutgers!ucsd!ucsbcsl!silber@sbphy.ucsb.edu
From: silber@sbphy.ucsb.edu
Newsgroups: comp.ai
Subject: Re: the terminus technicus "PSEUDO-Random"
Message-ID: <1905@hub.ucsb.edu>
Date: 1 Jun 89 16:20:37 GMT
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Organization: UC, Santa Barbara. Physics Computer Services
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