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From: Florian Weimer <someone@deneb.cygnus.argh.org>
Subject: Re: Function name problem
Date: 2000/01/26
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"Matthew Heaney" <matthew_heaney@acm.org> writes:

> The operator symbol "=" to mean equality has a long history, dating to
> 1577, when it was used by Robert Recorde:

``And to auiode the tediouse repetition of these woordes: is equal to:
I will sette as I doe often in woorke use, a paire of parallelees, or
Gemowe lines of one lengthe, thus: =, bicause noe .2. thynges, can be
moare equalle.'' (Robert Recorde, The Whetstone of Witte.  London, 1557.)

(Cited by Knuth/Graham/Patashnik in `Concrete Mathematics' when they
give reason for overloading the `=' symbol as part of the O notatition.)