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Re: Just for fun: Shortest InputForm to achieve a given Kernel error

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82123] Re: [mg82031] Just for fun: Shortest InputForm to achieve a given Kernel error
  • From: "厉正吉" <zhengji.li at gmail.com>
  • Date: Fri, 12 Oct 2007 03:05:20 -0400 (EDT)
  • References: <200710100821.EAA26453@smc.vnet.net>

I have found 2 answers after some try.

For General::ovfl: 9^99!
For $IterationLimit::itlim: #0@# &@1

On 10/10/07, Andrew Moylan <andrew.j.moylan at gmail.com> wrote:
> "1/0" is a string of length 3 which, when interpreted as InputForm (in a
> clean Kernel), generates a Power::infy error:
>
> ToExpression["1/0", InputForm];
> >> Power::infy: Infinite expression 1/0 encountered.
>
> I think this is the shortest string with this property.
>
> Here are some other errors and the lengths of the shortest strings I can
> find to generate them:
>
> $RecursionLimit::reclim: Recursion depth of 256 exceeded.
> Input length: 4
>
> General::ovfl: Overflow occurred in computation.
> Input length: 5
>
> (Kernel running out of memory)
> Input length: 5
>
> General::unfl: Underflow occurred in computation.
> Input length: 6
>
> $IterationLimit::itlim: Iteration limit of 4096 exceeded.
> Input length: 7
>
> Can you figure out how to generate those errors with input strings of that
> length? Can you find any *shorter* solutions?
>
>
>


-- 
Li Zhengji
-------------------------------------------------------------
If all you have is a hammer, everything is a nail.
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