Re: Combined Set, SetDelayed
- To: mathgroup at smc.vnet.net
- Subject: [mg100837] Re: Combined Set, SetDelayed
- From: magma <maderri2 at gmail.com>
- Date: Tue, 16 Jun 2009 21:48:47 -0400 (EDT)
- References: <email@example.com> <firstname.lastname@example.org>
On Jun 15, 11:37 am, Helen Read <h... at together.net> wrote: > AES wrote: > > Helen Read <h... 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? > > No, no typo. Not sure what your point is. > > -- > Helen Read > University of Vermont I think AES point is that this timing figure seems a bit too unrealistic. I personally got a timing of 1.33357*10^-17 sec. About 100 times faster! Now, a light signal - regardless of frequency - travels a distance of about 40 angstrom during that time. Is this meaningful or is it just a way for Mathematica to say that the operation was too fast to be timed properly?