#860 li[2] and li[3] are only accurate to single-precision

open
nobody
5
2006-09-08
2006-01-19
Raymond Toy
No

After examining the code for li2numer and li3numer, we
see that the constants used in evaluating these two
functions are only accurate to 8 digits or so.

li[2](0.5) ->
0.5822405249432515

According to mma, the result is

0.58224052646501250590265632

Discussion

  • Raymond Toy
    Raymond Toy
    2006-02-01

    Logged In: YES
    user_id=28849

    A new implementation of li[2] has been added, so li[2]
    should have double-float precision accuracy now. li[2](0.5)
    -> .5822405264650125.

     
  • Robert Dodier
    Robert Dodier
    2006-08-15

    • labels: --> 460522
     
  • Robert Dodier
    Robert Dodier
    2006-09-08

    • labels: 460522 --> Lisp Core - Floating point