[Maxima-bugs] [ maxima-Bugs-1045287 ] FLOAT(EXP(EXP(2))) does not give a complete answer

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Bugs item #1045287, was opened at 2004-10-12 06:43
Message generated for change (Settings changed) made by robert_dodier
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>Category: Lisp Core - Floating point
Group: None
Status: Open
Resolution: None
Priority: 7
Submitted By: Alexander VIDYBIDA (vidybida)
Assigned to: Nobody/Anonymous (nobody)
Summary: FLOAT(EXP(EXP(2))) does not give a complete answer

Initial Comment:
Maxima version: 5.9.1
Maxima build date: 17:35 10/8/2004
host type: i586-pc-linux-gnu
lisp-implementation-type: Kyoto Common Lisp
lisp-implementation-version: GCL 2.6.5 (--enable-ansi)

 When applied to compositions like EXP(EXP(2)), or
EXP(SIN(2)), the FLOAT() function seems unable to get a
complete result. If we consider SIN(SIN(2)), or
SIN(EXP(2)) instead, the result is complete.

(%i1) float(EXP(EXP(2)));

                                                2
                                              %E
(%o1)                        2.718281828459045
(%i2) float(EXP(SIN(2)));

                                             SIN(2)
(%o2)                       2.718281828459045
(%i3) float(SIN(EXP(2)));

(%o3)                          0.89385495491281

(%i5) display2d:false$

(%i6) float(EXP(EXP(2)));

(%o6) 2.718281828459045^%E^2
(%i7) float(EXP(SIN(2)));

(%o7) 2.718281828459045^SIN(2)
(%i8) float(SIN(EXP(2)));

(%o8) 0.89385495491281


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Comment By: Robert Dodier (robert_dodier)
Date: 2006-07-29 00:40

Message:
Logged In: YES 
user_id=501686

Observed in 5.9.3cvs. 

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