A499
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> When I integrate (x*(ln(x))^2)/2 step by step in the HP49 I get a
> message displaying Risch alg. of tower and {ln(x) x}. What is this
> algorithm? can anybody explain it to me?


It's a non-trivial algorithm, especially for a full implementation,
and would take a long time to explain. Also, I'm not good at
explaining things (it would be better to read standard books on
computer algebra such as Modern Computer Algebra by von zur Gathen).
However, if you'd still prefer an explanation here, I can try.
--
Bhuvanesh
P.S.: The tower refers to a tower of extensions. Also, the Risch
algorithm is not really needed for this particular problem.
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> I'm using a 49 G...sorry, forgot to include that.  I do also have a 48
G+ if
> that helps.

 Is there a way to enter symbolic stuff into a matrix?  e^t for
example.
> This is normally a 2x2 matrix that is multiplied by a 2x1.



> just open the MatrixWriter and then highlight the cell, in
> which you want to enter the symbolic expression and press EQW.
> Write the symbolic expression in the EquationWriter and
> then press ENTER. The expression is now in the cell.
 I hope that helps!
 Alex Markatis, Greece
 Civil Engineer
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> What should I ask, Jordi? I didn't get that.
I included this link:
http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/forum.cgi?read=24917
Pinko. Anyway it's a good thing they asked for the *RPN* calcs' manuals.
Now, someone should send them Wlodek's guide, the collector's bible:
http://www.magpage.com/~jakes/1998/hhc98/saturday/pict0067.jpg
HPCC #1046
-- 
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> Basically, I don't want to have to deal with entering #...h all the
> time.
You can omit the h if you're in HEX mode.
> Also, bit-shift would be nice
Built-in.
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>>Basically, I don't want to have to deal with entering #...h all the
>>time.  Also, bit-shift would be nice ...
> Isn't that what SR/SL/RL/RR do? Or do you have something else in mind?
Those do exactly it...  It looks like all I'd really need to do to
accomplish my objective then, would be to set up a user keymap with
these functions readily accessible, and maybe write a thin wrapper so I
don't have to deal with the # all the time.
Is there a way to switch between multiple user keymaps?  Does it work to
replace UserKeys and UserKeys.CRC in the hidden directory?
Mike
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Good Afternoon
Can someone explain how to open a 49g, preferably without a
sledgehammer. Also has anyone ever tried to increase available ram
without frying the insides.
 Just curious.
Stan