Maxima 5.21 change log
   Compiled 2010-04-14


   New items in core:

 * plot3d: multiple surfaces; built-in spherical transformation


   Other revisions:

 * revision of hypergeometic functions

 * extension of Bessel functions

 * extension of abs_defint function

 * extension of Riemann zeta function

 * limits of signum functions

 * package draw: new graphic object 'tube'


   Bug fixes:

   2979579: plot3d with format xmaxima does not work in Xmaxima
   2976744: postscript terminal requires manual reset of default termina
   2976657: Usage of gammagreek and %gammagreek
   2974616: mat_cond
   2969599: integrate bug?
   2968344: gamma_incomplete(1.0, 4.368265444147715e+19) fails
   2968174: Integration of hypergeometric bug
   2965201: run_testsuite() causes Lisp error
   2965115: 2*%e,numer -> single float precision
   2962943: simplifya gives Lisp error for a cons
   2961822: sinh(0.0b0) causes Maxima to abort
   2957758: plotting gamma_incomplete_regularized incorrect
   2954141: Kummer reflection
   2953369: Definite Integration of 1/(a-b*cos(x)) wrong
   2949677: hypergeometric floating point
   2948800: integrate((1-cos(2*x)^2)^2/x^4,x,0,inf) wrong
   2945609: incomplete/misleading documentation of coeff
   2943581: Grind omits empty strings
   2943400: 'linel' command can crash 'maxima'
   2938716: too much evaluation in translated code
   2938177: simplify_sum(sum(k^n,k,1,m)) -> stack overflow
   2938078: Crash on attached input
   2937837: find_root_error documentation incorrect
   2935631: bfloat(log(n)) can be different from log(bfloat(n))
   2933996: abs_integrate bug
   2933440: sqrt(-z^2) simplifies to %i*sqrt(z^2) for z complex
   2932096: allroots fails for real polynomial.
   2927502: abs() or cabs() are much slower than just sqrt(re^2+im^2)
   2924831: file_type is wrong for ccl on mac os x
   2921946: Expansion of bessel_k(1/2,x) with radexpand:false
   2920190: non-integer value for maxposex
   2919296: binomial sums
   2914376: implicit_plot error
   2914296: Limit gets Maxima stuck
   2914176: Conversion of rational to bfloat is inaccurate
   2913614: LAPACK: dgesvd is broken
   2911891: gcfac gives Lisp error
   2910437: non-repeatable beta_incomplete(1b0,1,z)
   2910001: optimization of bfloat input
   2909980: optimization for log of bfloats
   2909917: documentation type -- jornan
   2907952: diff of a taylor series
   2907815: sold variable in diag(x) (package diag) should be local
   2907727: Incorrect Integral with option integrate_use_rootsof
   2892710: Allow easier library access
   2880797: bad answer in integrate(sqrt(sin(t)^2+cos(t)^2),t,0,2*%pi)
   2875784: fourier integral incorrect
   2859856: csign(log(x)) --> pnz
   2852992: sqrt(-1/x)-%i/sqrt(x) not zero
   2843621: GosperSum error
   2808861: list function arguments with mode_declare in translate
   2786017: realonly in algsys.lisp
   2607007: legend does not work
   1869296: hgfred([1,2],[6],1) bogus
   1857562: hgfred([a,b],[c], 0) -/--> 1
   1633149: sum bug that never happens
   1620165: assoc needs to check argument, was: Strange error
   1531688: hgfred([ ], [ ], 0)
   1440286: documentation for 'listofvars'
   1440069: euler numbers & zerobern
   1376392: limit(x/(2+sin(1/x)), x, 0); wrong result
   1372264: no user doc for 'numer_pbranch'
   1219846:  properties of translated functions
   1106912: limit(x/sin(x)^2,x,inf)
   1010768: sqrt(1/z) - 1/sqrt(z) => 0
    932095: ode2 redundant asksign
    910270: 1/+3*x parses as 1/(+3*x)
    903166: assume works for real values only
    900860: Simplifications involving abs
    893633: depends(a,[b,b,b])
    856209: inconsistency between facts() and facts(v)
    840848: trigreduce doesn't enter unknown functions
    811522: redundant question in limit
    781657: binomial(x,x) => 1, but binomial(-1,-1) => 0
    777564: subtraction \"-\"(a,b) should work/FIX
    776441: orderlessp not transitive
    767556: Distributing operations over =
    767528: op(box(a)) bogus
    752417: KEEPFLOAT:TRUE ignored by SOLVE
    719968: No SIMP function
    710307: orderlessp of bfloat, %e, and inf
    660876: taylor and keepfloat ERR
    655270: Incomplete integration
    643254: orderlessp([rat(x)], [rat(x)])
    593351: limit/sin(inf)etc. should give 0, not IND