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Re: Combined Set, SetDelayed

• To: mathgroup at smc.vnet.net
• Subject: [mg100819] Re: Combined Set, SetDelayed
• From: AES <siegman at stanford.edu>
• Date: Sun, 14 Jun 2009 21:21:36 -0400 (EDT)
• Organization: Stanford University
• References: <h0vteh$6v2$1@smc.vnet.net> <h12gck$e8s$1@smc.vnet.net>

In article <h12gck$e8s$1 at smc.vnet.net>, Helen Read <hpr at together.net> 
wrote:

> 0.811 seconds. The second version, using the function that remembers 
> values, took only 1.87003*10^-15 seconds.

The frequency of visible light is around 3*10^14 Hz, so that's around 
one period of a visible light wave.  Is there maybe a typo here?