Another Math Comic

Posted on 2007-01-31 10:57 By Will ( Maple Rating 4

824)

XKCD continues to post some great comics, often relating to math. Check this one out:

And yes, Maple does get it right

Maple Equation

Comments

Comment on 2007-01-31 13:26 from acer ( Maple Rating 4

1410)

You showed a result from Maple of 19.99909999 .

Presumably that was done at the default value of Digits=10.

But, evalf[11](exp(Pi)-Pi) returns as 19.999099979 .

So why isn't the the first result, at the default value of Digits=10, instead 19.99909998 ?

acer

Comment on 2007-02-06 18:23 from Danial Howard (5)

Another interesting comparison is:

(Digits is set to default value of 10.)

evalf(exp(Pi)-Pi);
19.99909999

evalf[9](exp(Pi)-Pi);
19.9991000

evalf[10](exp(Pi)-Pi);
19.99909998

evalf[11](exp(Pi)-Pi);
19.999099979

evalf[12](exp(Pi)-Pi);
19.9990999792

evalf[13](exp(Pi)-Pi);
19.99909997919

Comment on 2007-02-01 03:55 from lehalle ( Maple Rating 2

183)

>> format long
>> exp(pi)-pi
ans =
  19.999099979189474
>> maple('evalf(exp(Pi)-Pi)')
ans =
  19.999099979189475767266442984668

who's right?

Comment on 2007-02-02 00:53 from weseldrdge (7)

XKCD, he is always putting up great comics.