Alg48 vs. Erable

Ken Alverson

unread,

Jan 21, 1998, 3:00:00 AM1/21/98

to

Has anyone used both and could you tell me what the differences are (besides
40K)? I know erable uses part of Alg48, so it seems to be Alg48+, but I
would like to know more...

Ken

Andreas Boman

unread,

Jan 23, 1998, 3:00:00 AM1/23/98

to

You are pretty much right about Erable being Alg48+, but there are
several differences. Erable is written in SYS-RPL while Alg48 is written
in sys-rpl/ ML, so Alg48 is usually faster than Erable (at most things
that it handles). Alg48 does not handle as many integrals as Erable (ie.
log/exponential, trig functions etc.) but is totally awsome on
polynomials . Erable also has: limits, Taylor expansions, DiffEq solver,
Laplace/inverse Laplace transforms, eigenvalues eigenvectors etc. Alg48
does Groebner base computation.
etc. etc.

I say, get both and use the appropriate function from the lib that suits
your purpose.

Andreas

Ken Alverson

unread,

Jan 24, 1998, 3:00:00 AM1/24/98

to

Andreas Boman wrote in message <34C94C56...@uscolo.edu>...

>You are pretty much right about Erable being Alg48+, but there are
>several differences. Erable is written in SYS-RPL while Alg48 is written
>in sys-rpl/ ML, so Alg48 is usually faster than Erable (at most things
>that it handles). Alg48 does not handle as many integrals as Erable (ie.
>log/exponential, trig functions etc.) but is totally awsome on
>polynomials . Erable also has: limits, Taylor expansions, DiffEq solver,
>Laplace/inverse Laplace transforms, eigenvalues eigenvectors etc. Alg48
>does Groebner base computation.
>etc. etc.
>
>I say, get both and use the appropriate function from the lib that suits
>your purpose.

I would, but at the moment I'm hovering at 20K free. Time for a 128K ram
card, no? =) Thanks for the info!

Ken

Blake Garretson

unread,

Jan 26, 1998, 3:00:00 AM1/26/98

to

"Ken Alverson" <Ke...@nospamplease.TSO.Cin.IX.Net> wrote:
>Has anyone used both and could you tell me what the differences are (besides
>40K)? I know erable uses part of Alg48, so it seems to be Alg48+, but I
>would like to know more...

The main difference is that ALG48 is a great package for symbolic
algebra while Erable adds the ability to do more complex calculus. I
use ALG48 for symbolic matrices and symbolic equation manipulation and
simplification. I use Erable for symbolic integration and derivation.
Erable has most of the same algebraic commands that ALG48 has, but the
functions work a bit slower on average. Erable is a little slower
because its commands handle complex numbers and square roots natively.
It's not always slower though. For instance, both packages have add,
subract, multiply, divide, etc. replacements that work on symbolic
matrices, but Erable seems to be faster on them.

Here's also a little clip from the Erable docs:
"The main specific feature of alg48 is the Gr¨obner base computation.
The main specifics features of erable are eigenvalues and eigenvectors
of matrices, differential equations (first order: linear, Bernouilli,
homogenous; linear with constant coefficients), limits and Taylor
series, quadratic forms, permutations, variable substitutions."

I'd have describes those features myself, but I don't know how to use
most of those yet ;)

Obviously, if you don't have room for both (and you don't do Grobner
base computations), Erable does a lot more although it may do it
slower. I'd go with Erable if you think you need to do any symbolic
integration. It's a real time saver.

Hope this helps.
-----------------------------------------------------
Blake T. Garretson
bgar...@eng.utoledo.edu
http://eng.utoledo.edu/~bgarrets
-----------------------------------------------------

Ken Alverson

unread,

Feb 1, 1998, 3:00:00 AM2/1/98

to

Well my teacher doesn't know what the HP is capable of, so it isn't banned
on anything at the moment =P. We haven't done Concours anyway. If you get
Erable 2.99 it has a nifty setup thing that if you start with memory clear
you'll end up with about 20K and Erable, eqstack, miniwriter, ufl, and the
key bindings all set up.

Ken

MOURRET wrote in message <01bd2f53$4af80080$788efcc1@simon-s>...
>I Think Erable makes more symbolics than Alg48
>(Taylor,Laplace,Trigo,Limit...)
> But you must have a card. And I can't use it in Tests(Concours).
>So if someone knows how to run erable without loose 120k, Can he tell me
>please..
>

MOURRET

unread,

Feb 1, 1998, 3:00:00 AM2/1/98

to

Maurice Al-Khaliedy

unread,

Feb 2, 1998, 3:00:00 AM2/2/98

to

Andreas Boman schrieb am 23.01.98, 10:05 in COMP.SYS.HP48:
AB>Ken Alverson wrote:
AB>

> Has anyone used both and could you tell me what the differences are
>(besides
> 40K)? I know erable uses part of Alg48, so it seems to be Alg48+, but
>I
> would like to know more...
>

> Ken

I use both and these two libs are the best symbolic math libs i've
ever seen on a Calculator. I have seen the TI92 and Casio but the HP48
with the functions from ERABLE AND ALG48 are realy the BEST.

Thank you Bernard and Claude/Mika.

Maurice Al-Khaliedy
electrical engeenering Student
Cologne/Germany

Porc...@handlesanycurve.com

unread,

Feb 3, 1998, 3:00:00 AM2/3/98

to

In article <01bd2f53$4af80080$788efcc1@simon-s>, "MOURRET"
<simon....@wanadoo.fr> wrote:

I don't have any personal experience with Erable (simply not enough mem),
but Alg48 isn't as useful for integration as I thought it would be. Don't
get me wrong; the symbolic algebra is wonderful for churning physics
equations/etc., but I'm greedy. RINT is nice, but won't do much that I
can't already do in my head.

MALofquist

unread,

Feb 4, 1998, 3:00:00 AM2/4/98

to

If you are displeased with the versitility of the RINT that alg48 has and
cannot squeeze in Erable, just use the RISCH from ALGB48.

ML