| Thu Dec 21 21:46:54 2000 Brian Gough <bjg@network-theory.co.uk> |
| |
| * changed err to abserr, to make it clear that it is an absolute |
| error in line with other modules. |
| |
| Thu Nov 2 20:08:14 2000 Brian Gough <bjg@network-theory.co.uk> |
| |
| * added support for a workspace so that the user does not have to |
| allocate memory |
| |
| * made the names of the functions consistent as either levin_u, |
| for the full u transform with error estimate, or levin_utrunc for |
| the u transform with only a truncation error estimate. |
| |
| Mon Apr 24 21:15:27 2000 Brian Gough <bjg@network-theory.co.uk> |
| |
| * gsl_sum.h: added #include <stdlib.h> for size_t |
| |
| Mon Nov 1 12:50:17 1999 Brian Gough <bjg@network-theory.co.uk> |
| |
| * test.c (main): added tests using series for the Euler constant |
| and eta(1/2) |
| |
| * resolved problems with spurious failures by replacing the |
| directly computed truncation error by an estimate which varies |
| more smoothly. I have used the average of the previous two values, |
| which seems to give a reliable estimate of the truncation |
| error. The direct evaluation of the truncation error sometimes |
| fluctuated wildly, due to cancellation effects. |
| |
| Thu Oct 28 12:05:47 1999 Brian Gough <bjg@network-theory.co.uk> |
| |
| * test.c: cleaned up tests, now find that everything works in |
| double-precision but not extended-precision where there are two |
| failures depending on the optimization level |
| |
| * levin_uerr.c (gsl_sum_levin_u_accel_minmax): changed loop |
| maximum from <=n to <n to avoid access of uninitialized memory, |
| need further correctness checks on algorithm though. |
| |
| Thu Oct 7 12:03:36 1999 Brian Gough <bjg@network-theory.co.uk> |
| |
| * levin_u.c levin_uerr.c: changed DBL_MAX to GSL_DBL_MAX since we |
| don't rely on DBL_MAX |
| |
| Sat Feb 6 20:35:26 1999 Brian Gough <bjg@netsci.freeserve.co.uk> |
| |
| * test.c: adjusted the precision check to allow for "infinite |
| accuracy" which occurs when two results agree to machine precision |
| |
| Thu Nov 19 13:10:19 1998 Brian Gough <bjg@vvv.lanl.gov> |
| |
| * added an n_used parameter to all routines which gives the number |
| of terms actually used |
| |
| Tue Nov 17 12:31:03 1998 Brian Gough <bjg@vvv.lanl.gov> |
| |
| * test.c: added #include <config.h> |
| |
| * renamed test_sum.c to test.c |
| |
| * renamed all the functions so that _with_derivs is now the |
| default and _trunc is the case of no error estimates from the |
| derivatives |
| |
| * test_sum.c (main): cleaned up tests |
| |
| Mon Nov 9 22:05:45 1998 Brian Gough <bjg@vvv.lanl.gov> |
| |
| * levin_u.c (gsl_sum_levin_u_accel_minmax): got rid of noise |
| variables since they aren't used in the non-derivative case |
| |
| 1998-11-06 <bjg@ancho.lanl.gov> |
| |
| * test_sum.c: replace variable N by macro to avoid variable length |
| array warning |
| |
| Tue Oct 27 18:06:16 1998 Brian Gough <bjg@vvv.lanl.gov> |
| |
| * levin_u.c: added in noise but it does not seem to be giving the |
| right answer for the error estimate. The actual value for the |
| accelerated sum is correct though. Check toms/602 for the original |
| algorithm. |
| |
