Path: utzoo!utgpu!water!watmath!clyde!att!ucbvax!ucsfcgl!cca.ucsf.edu!ccb.ucsf.edu!dick
From: dick@ccb.ucsf.edu (Dick Karpinski)
Newsgroups: comp.arch
Subject: Re: Trachtenberg System of Math
Summary: Here's one reference
Message-ID: <1446@ucsfcca.ucsf.edu>
Date: 27 Oct 88 22:35:02 GMT
References: <6232@june.cs.washington.edu> <6821@pasteur.Berkeley.EDU>
Sender: root@cca.ucsf.edu
Reply-To: dick@ucsfccb.UUCP (Dick Karpinski)
Organization: UCSF Computer Center
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In article <6821@pasteur.Berkeley.EDU> aho@cory.Berkeley.EDU.UUCP (Alex Ho) writes:
>In article <6232@june.cs.washington.edu> pardo@cs.washington.edu (David Keppel) writes:
>>As a kid I read part of a book called "The Trachtenberg System of
>>Math" or some such.  The basic idea was that there were several rules
>>that could be applied to *all* numbers to do *very* fast (linear in
>>number of digits?) multiplies and multi-row adds. 
>
>do you have a reference to the original source,

I just checked for Trachtenberg in Univ of Calif Melvyl system
and found a book (at UCSD) called Trachtenberg Speed Math by
Ann Cutler in 1975 through Doubleday.  The originator was one
Jakow T. who seems to have been born in 1888.

Dick

Dick Karpinski  Manager of Minicomputer Services, UCSF Computer Center
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