without thinking about error propagation:

write as ln(E(x+1)) = ln(-E(x))+ln((-11*P+10*E(x))/P) for E negative (x large)

then ignore the 11 (from known values) and get E(x+1) = -10/P*E(x)^2

use rsolve (for which starting value n?) ... just a thought ...

without thinking about error propagation:

write as ln(E(x+1)) = ln(-E(x))+ln((-11*P+10*E(x))/P) for E negative (x large)

then ignore the 11 (from known values) and get E(x+1) = -10/P*E(x)^2

use rsolve (for which starting value n?) ... just a thought ...

If only 1 - 2 steps more are needed (and not having a good idea for the task [modified logistic map ?]
in that homework (?) here is a lame modification:

  P:=15000:
  R:=proc(n) option remember;
  local r;
  if n < 19 then 
    -R(n-1)*(-11*P+10*R(n-1))/P;
  else
    r:= evalf(R(n-1));
    -r*(-11*P+10*r)/P;
  end if;
  end proc:
  R(1):=1:

  st:=time():
  R(20): evalf(%);
  time() - st;

                                        17778
                        -0.5132740841 10

                                3.562

If only 1 - 2 steps more are needed (and not having a good idea for the task [modified logistic map ?]
in that homework (?) here is a lame modification:

  P:=15000:
  R:=proc(n) option remember;
  local r;
  if n < 19 then 
    -R(n-1)*(-11*P+10*R(n-1))/P;
  else
    r:= evalf(R(n-1));
    -r*(-11*P+10*r)/P;
  end if;
  end proc:
  R(1):=1:

  st:=time():
  R(20): evalf(%);
  time() - st;

                                        17778
                        -0.5132740841 10

                                3.562

Perhaps you overlooked it, but there are example in ?dsolve/system (even if I rarely use dsolve) :

  sys2 := [diff(f(t),t) = cos(f(t)), diff(g(t),t) = -f(t)^(1/2), diff(h(t),t,t) = g(t)/f(t)];
  dsolve(sys2);

Perhaps you overlooked it, but there are example in ?dsolve/system (even if I rarely use dsolve) :

  sys2 := [diff(f(t),t) = cos(f(t)), diff(g(t),t) = -f(t)^(1/2), diff(h(t),t,t) = g(t)/f(t)];
  dsolve(sys2);

as standard XP has a 'firewall' and has it activated - though I use ZoneAlarm instead and after each install or update it asks whether certain Maple programms are allowed allowed (especially mserver)

as standard XP has a 'firewall' and has it activated - though I use ZoneAlarm instead and after each install or update it asks whether certain Maple programms are allowed allowed (especially mserver)

I support #9 and #10, already something like Google Desktop does such on usual documents (if you are not concerned about privacy)

PS: there is already a thread for such suggestions ... and if the board search would be more capable it would be easy to find :-)

Just want to say: this seems not to work on Win XP SP2 + Maple 12 Classic
for concurrent GSview (4.9 + Ghostscript 8.64) and even PDFCreator (based
on that) gives an empty file. Dito M11 and M10 do not work with it, Maple 9.5
is ok with it [except the plot commands in the very example].

However in Maple 12 Standard it is ok.

Just want to say: this seems not to work on Win XP SP2 + Maple 12 Classic
for concurrent GSview (4.9 + Ghostscript 8.64) and even PDFCreator (based
on that) gives an empty file. Dito M11 and M10 do not work with it, Maple 9.5
is ok with it [except the plot commands in the very example].

However in Maple 12 Standard it is ok.

I find the possibilty in Maple's excel addin more handy: one just says Maple(commandString). Sadly they do not provide it as an example ...

So one can first built the sequence of commands in Maple for testing and then export as text file. From there you just copy and paste to VB and have an almost validated code.

BTW: In my oppinion what would be a really helpful application using that technology is an archive application: run through all sheets in a directory, remove outputs and save/export as text files (thus having a readable backup without needing Maple to open). Not sure it can be done through Maple commands (as one has to execute commands, which I access through the menu bar)

I find the possibilty in Maple's excel addin more handy: one just says Maple(commandString). Sadly they do not provide it as an example ...

So one can first built the sequence of commands in Maple for testing and then export as text file. From there you just copy and paste to VB and have an almost validated code.

BTW: In my oppinion what would be a really helpful application using that technology is an archive application: run through all sheets in a directory, remove outputs and save/export as text files (thus having a readable backup without needing Maple to open). Not sure it can be done through Maple commands (as one has to execute commands, which I access through the menu bar)

I would guess the first plot is done by VB on inputs from Maple - or by translating the plot structure form Maple?

Not sure why they do export graphics ... perhaps I would define a function (to be feed from Maple) and plot in the concurrent system.

Anyway: if doing more then computation - say towards an application - it probably makes more sense to use Maplets and stay within Maple's environmental setting (no, I never used that) and have the possibility to enrole it by web technology (using VB and OpenMaple will always assume that Maple is installed ...)

fine ... however when I try at work it is slow. Now I try it at home,
which does not better: it needs minutes (!) to load. Why should I look
up the www help to point a questioner to the very point?

My guess: switch off the Maple frame, restrict to essentials and just
link to Maple's page (which would make it clearer where to enter an
item to search).

Example: I entered "sturmseq" (at the left search box). Result is
"sturm" (while "sturmseq" is at the result page), "Sturm sequence"
returns a list (containing "sturm", but not "sturmseq"), while some
"strom seq" or "storm sequence" gives nothing reasonable.

Which is a bit poor for www technologies. So there is room for some
improvement :-)