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From: SourceForge.net <noreply@so...>  20031105 20:55:56

Bugs item #836780, was opened at 20031105 14:55 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836780&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: taylor(acosh(x),x,1,1) Initial Comment: The following is wrong: (C1) taylor(acosh(x),x,1,1); (D1) (%PI2*LOG(SQRT(2)+1))/2SQRT(2)*(x1)/2 Converting to log form, we do better  it's correct, I believe. But the result isn't simplified. (C2) taylor(logarc(acosh(x)),x,1,1); (D2) +SQRT(2)*SQRT(x1) (C3) ?print(%); ((MRAT SIMP (((MEXPT RATSIMP) 2 ((RAT) 1 2)) ((%LOG SIMP) ((MPLUS SIMP) $x ((MEXPT SIMP) ((MPLUS SIMP) 1 ((MEXPT SIMP) $x 2)) ((RAT) 1 2)))) ((MPLUS SIMP) 1 $x)) (#:2^(1/2)21846 #:LOG(SQRT(2)+1)21846 #:2^(1/2)21846 #:%PI21846 #:ACOSH(x)21846 #:x21846) (($x ((1 . 1)) 1 NIL #:2^(1/2)21846 . 2)) TRUNC) PS (#:2^(1/2)21846 . 2) ((1 . 1)) ((1 . 2) (#:2^(1/2)21846 1 1) . 1)) (D3) +SQRT(2)*SQRT(x1) (C4) Barton  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836780&group_id=4933 
From: SourceForge.net <noreply@so...>  20031105 20:43:24

Bugs item #836773, was opened at 20031105 14:43 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836773&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: ntrig is broken Initial Comment: (C4) load("ntrig.mac"); (D4) ?C\:\/maxima\/Maxima\/share\/maxima\/5\.9\.0 \/share\/trigonometry\/ntrig\.mac (C5) sin(6*%pi/5); (D5) (SQRT(5)1)*SQRT(SQRT(5)+5)/(4*SQRT(2)) (C6) float(%); (D6) 0.58778525229247 (C7) sin(float(6*%pi/5)); (D7) 0.58778525229247 Barton  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836773&group_id=4933 
From: SourceForge.net <noreply@so...>  20031105 19:01:15

Bugs item #836708, was opened at 20031105 14:00 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836708&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Stavros Macrakis (macrakis) Assigned to: Nobody/Anonymous (nobody) Summary: rat/tellrat/modulus:2 can return 1 Initial Comment: algebraic:true$ modulus:2$ tellrat(a^2+a)$ rat(a^2) =>  a With modulus=2, 1 is supposed to simplify to 1. This can be fixed (bizarrely) by ev: ev(%) => a  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836708&group_id=4933 
From: SourceForge.net <noreply@so...>  20031105 18:57:21

Bugs item #836704, was opened at 20031105 13:56 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836704&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Stavros Macrakis (macrakis) Assigned to: Nobody/Anonymous (nobody) Summary: gendiff is all bugs: should be deprecated Initial Comment: The gendiff package only gets the most trivial cases right, and should probably be deprecated until it is fixed. load("gendif") gendiff(x,x,n) => 'diff(x,x,n) which is correct, except that gendiff is supposed to give an explicit form *without* 'diff's. After all, it does it for x^2: genfact(2,n,1)*x^(2n) so why doesn't it give genfact(1,n,1)*x^(1n) in this case? Sure, that's clumsy, but it's explicit.  gendiff((x1)^2,x,n) => 0 (!!) The ratexpand in gendiffpow is presumably supposed to be ratexpand(x1^x2); but though that fix works in this particular case, it doesn't work for sin(x)^2.  q: gendiff(x*(x+1),x,n) => 'DIFF(x,x,n)*'SUM(BINOMIAL(n,I)*'DIFF(x,x,I),I,0,n) which looks very impressive, but is wrong. In particular, subst(0,n,q) => x^2 (!!) and subst(1,n,q) => (x+1) (!!). Correct answers are of course x*(x+1) and 2*x+1.  gendiff(x^x,x,n) => x^(xn)*GENFACT(x,n,1) (!!) but diff(x^x,x,1) => x^x*(log(x)+1) (OK) gendiff is assuming that all powers are free of the differentiation variable. To fix, add a freeof clause in gendiffpow: ...if x1=x <<<and freeof(x,x2)>>> then ...  gendiff is also pretty limited, not even handling sin(x) ===> sin(x+n*%pi/2) sinh(x) ===> (%e^x+(1)^n*%e^x)/2 (also expressible as pure hyperbolics)  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836704&group_id=4933 
From: SourceForge.net <noreply@so...>  20031105 15:36:37

Bugs item #836567, was opened at 20031105 10:36 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836567&group_id=4933 Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Stavros Macrakis (macrakis) Assigned to: Nobody/Anonymous (nobody) Summary: limit doesn't understand 'integrate Initial Comment: limit(x*'integrate(f(t),t,0,x),x,0) => 0 (!! should be nounform) but limit(x*f(t),x,0) => nounform (OK) and limit(x*'integrate(f(x),x,0,x),x,0) => nounform (OK) Apparently it doesn't understand that 'integrate(f (t),t,0,x)) is an arbitrary function of x.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=836567&group_id=4933 