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Groups > comp.soft-sys.math.mathematica > #3151
| From | Richard Fateman <fateman@cs.berkeley.edu> |
|---|---|
| Newsgroups | comp.soft-sys.math.mathematica |
| Subject | Re: Metastable expressions in Mathematica |
| Date | 2011-06-17 04:10 +0000 |
| Organization | Steven M. Christensen and Associates, Inc and MathTensor, Inc. |
| Message-ID | <itek4d$s7f$1@smc.vnet.net> (permalink) |
| References | <201106141014.GAA06248@smc.vnet.net> <ita4j9$mb1$1@smc.vnet.net> |
On 6/15/2011 4:21 AM, Leonid Shifrin wrote: > Hi David, > > This is a known effect. There is a special command Update, used in such > cases to force Mathematica to propagate changes like the one you discuss. > It is, in some views, an error, to define and implement a programming language with a semantics that is not deterministic, but depends on (for example) on the page in random access memory on which an expression is stored, to tell how it will be evaluated. Or call Update. I suspect this "feature" is unique to Mathematica among programming languages commercially supported. The fact that this is "known" to some people does not make it harmless. The fact that it almost never affects people does not make it harmless either. RJF
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Re: Metastable expressions in Mathematica Leonid Shifrin <lshifr@gmail.com> - 2011-06-15 11:21 +0000
Re: Metastable expressions in Mathematica Richard Fateman <fateman@cs.berkeley.edu> - 2011-06-17 04:10 +0000
Re: Metastable expressions in Mathematica David Bailey <dave@removedbailey.co.uk> - 2011-06-18 23:55 +0000
Re: Metastable expressions in Mathematica Daniel Lichtblau <danl@wolfram.com> - 2011-06-18 21:44 +0000
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