ChangeLog-5.23

   Maxima 5.23 change log


   Backwards-incompatible changes:

 * package draw: changed names of some options:
   file_bgcolor --> background_color
   pic_width, pic_height, eps_width, eps_height, pdf_width, pdf_height --> dimensions
   rot_horizontal, rot_vertical --> view


   New items in core:

 * function bf_find_root: bigfloat version of find_root

 * function find_root: recognize keyword arguments


   New items in share:

 * package cobyla: import Fortran COBYLA (constrained optimization)

 * package draw: new graphic objects 'errors' and 'region'


   Other revisions:

 * further work on exponential integrals

 * further work on abs and signum identities

 * further work on special cases in integration

 * translation of reference manual to German (ongoing)

 * clean-up in code related to processing files

 * general code clean-up

 * package ezunits: additional built-in conversions


   Bug fixes:

   3114834  maxima-help does not find help topics
   3111568  subsequent calls to gradef hide variable dependencies
   3102421  noninteractive-mode and kill(all)
   3101075  limit bug
   3093408  Bug in simplify_sum
   3085498  integration error (partial solution)
   3081820  lbfgs causes error
   3080397  laplace(unit_step(-t),t,s) generates an error
   3079975  rectform(atan2(y,0)) -> division by zero
   3073827  integrate(t*cos(a*t^2 + b*t + c), t, 0, 1) => division by 0
   3072490  contrib diag.mac variable scope
   3071208  rtest15--limit to inf from above
   3067311  eivects doesn't load eigen automatically
   3064709  domain error for tan
   3062883  diff does not recognize indirect dependencies in expressions
   3060669  filename_merge with more than two arguments
   3060166  und documentation is incorrect
   3058324  $save must bind *print-circle* to NIL
   3058290  tan(%pi*integer) simplification
   3055427  conjugate solver
   3045559  integrate(exp(-u^2), u, minf, x) => incorrect gamma_incomple
   3041267  jacobi_cs(x,1) returns a wrong expression
   3041196  carg(exp(x+%i*y)) -> y not correct
   3040667  logarc(acosh(z)) needlessly complicated
   3039452  integrate(sqrt(t^c)/(t*(b*t^c+a)),t) hangs
   3038883  In general exp(z)^a --> exp(z*a) not correct
   3034415  integrate(1/abs(x),x) using abs_integrate
   3024924  list_matrix_entries
   3020589  xlabel and ylabel don't change plot3d axis labels
   3020243  defint(exp(cos(x))*cos(sin(x)),x,0,2*%pi) wrong result 0
   2997443  ic2 fails
   2970792  gradef(s) together with vect package
   2881021  ic2 and bc2 may return incorrect results (solution suggeste)
   2796194  error doing a Fourier transform.
   2727846  tan(%pi/2) is not correct (or just not nice?)
   2555641  no doc for subnumsimp
   2541376  antidiff bug
   2171237  load(basic) warnings
   2123651  min and max of imaginary and real numbers
   1993208  cartesian_product incorrect on empyt argument list
   1990099  wrong integer_partitions(0)
   1892341  taylor message about something assumed to be 0 in integral
   1890128  no user doc for cauchy_matrix
   1839088  ic2 fails with division by 0
   1789213  ic1 for solution containing indefinite integral
   1439559  function burn is broken
   1213621  reveal with matrix argument
   1149719  ratvarswitch not documented
   1045920  a>1 and b>1, is a+b>2?
    875089  defint(f(x)=g(x),x,0,1) -> false = false
    767338  Evaluation of array names
    703789  save() doesn't return a pathname 
   (unnumbered)  integrate(cos(2*x)*cos(x),x) is wrong.