As Jaime says, the problem is that 1000! is too large to be represented as
a floating-point number. In some implementations, float(1000!) returns a
NaN value, which Maxima isn't prepared to handle.
Maxima should do a better job of catching such issues and reporting them to
the user in a sensible way.
-s
On Fri, Nov 23, 2012 at 9:34 AM, Jaime Villate <villate at fe.up.pt> wrote:
> On 11/23/2012 02:20 PM, Antonio Lapira wrote:
>
>> If I try to do:
>> (%i10) 1000!+1;
>> it works, while if I try this, I get an error message,
>>
>> (%i10) 1000!+0.1;
>>
> With the Lisp flavor that I'm using (SBCL) the error message tells you
> better what the problem is:
>
> Too large to be represented as a DOUBLE-FLOAT
>
> You're trying to add an integer to a double-float, which forces the large
> integer to be converted into a double float. The solution would be to use
> bigfloats or rational numbers, depending on what you are doing,
> 1000!+0.1b0;
> or
> 1000!+rat(0.1);
> or even
> 1000!+rationalize(0.1);
>
> See: ? bfloat, ? rat, ? rationalize
>
> Jaime
>
>
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