sound cyncial, but a good timing for an attack

Yes, there may be some problem with it (though I guess for first registration one could use it and change it later [that's what you did]).

Due to the pricing policy my guessing is that most users are commercials or academics or students. Commercials and academics always have some adress (however a machine should recognize a valid one), for students I am not that sure.

Agreed: it is not the best idea and a bit lame :-(


Anyway I have the impression that it is far to easy to register (in the hope of many users?).


And I find it astonishing how long it needs to clean up that mess: now it is ~ 20:00 in Europe or 14:00 in Canada, so they are at work since 5 hours ... I do not understand, why it is not possible to move idiotic posts to some quarantine folder and process or restore them later ... even assistant priest should be able to do such (may be the system does not have such a feature).

Also it is a bit strange, that this mess runs the whole weekend without any interaction ... but as I learned Maple is a small company, so 24/7 service is not doable, even if the web never sleeps.

Or are they on strike ?

Yes, there may be some problem with it (though I guess for first registration one could use it and change it later [that's what you did]).

Due to the pricing policy my guessing is that most users are commercials or academics or students. Commercials and academics always have some adress (however a machine should recognize a valid one), for students I am not that sure.

Agreed: it is not the best idea and a bit lame :-(


Anyway I have the impression that it is far to easy to register (in the hope of many users?).


And I find it astonishing how long it needs to clean up that mess: now it is ~ 20:00 in Europe or 14:00 in Canada, so they are at work since 5 hours ... I do not understand, why it is not possible to move idiotic posts to some quarantine folder and process or restore them later ... even assistant priest should be able to do such (may be the system does not have such a feature).

Also it is a bit strange, that this mess runs the whole weekend without any interaction ... but as I learned Maple is a small company, so 24/7 service is not doable, even if the web never sleeps.

Or are they on strike ?

One reason for asking was a task at sci.math.symbolic (where I stumbled over my own feet ...),
in some sense it reduces to:

  S:=Sum((-1)^m,m = 0 .. infinity);

  _EnvFormal:=false;
  value(S);
                         sum((-1)^m,m = 0 .. infinity)

  _EnvFormal:=true;

                                 1/2

Though I can guess what may be meant in the help I would prefer a concrete statement, being
not always a clairvoyant (do they mean Abel summation?). I vaguely remember some statement
about summing the last weeks, where also a silent generalization was mentioned (which can
not be find in the help pages).

Besides what the help pages lists for 'Environment Variables' I mean those starting with _Env...

Some can be found (but often not that quickly) and having one in an existing sheet
the help does not talk about it, so I look for some overview (without producing that myself).

I have some in mind (like _EnvAllSolutions or for setting Heaviside(0) = 0 or some
which empowers 'simplify' at computational costs).

But if I want to know about _EnvFormal then I am lost, though it seems to play a role in divergent series.

For me that is difficult to 'read'.

Can one do a summing/adding over a finite product of indices, say [0,1]^k as in this case (if I got it right) ?
Or just a (discrete) set?

For me that is difficult to 'read'.

Can one do a summing/adding over a finite product of indices, say [0,1]^k as in this case (if I got it right) ?
Or just a (discrete) set?

select both input & output with the mouse (and only that),
copy & paste via clipboard by <ctrl>+C & <ctrl>+C (on Windows)
to Mapleprimes (or an editor or what you wish) to get

RTABLE(192033604,MATRIX([[1, 0, 0], [0, 1, 0], [0, 0, 1]]),Matrix);
                            [1    0    0]
                            [           ]
                            [0    1    0]
                            [           ]
                            [0    0    1]

and in the last step you mark and choose Format=formatted in the editor here.

select both input & output with the mouse (and only that),
copy & paste via clipboard by <ctrl>+C & <ctrl>+C (on Windows)
to Mapleprimes (or an editor or what you wish) to get

RTABLE(192033604,MATRIX([[1, 0, 0], [0, 1, 0], [0, 0, 1]]),Matrix);
                            [1    0    0]
                            [           ]
                            [0    1    0]
                            [           ]
                            [0    0    1]

and in the last step you mark and choose Format=formatted in the editor here.

It seems that Maple does not know any of the description of the Math given
in the help pages for argument, though they are fundamental:

  abs(argument(exp(y*I))) <= Pi; # assuming (y::real);
  is(%) assuming (y::real);

                                 FAIL

  y = argument(exp(y*I)); 
  is(%) assuming (-Pi < y , y <= Pi);

                                 FAIL

Your suggestion goes twowards the 'unwinding number' unwindK, may be post
some on that the next days (since I wanted to have 'catalogue' similar to
the article of Aslaksen you notified me some days ago).

It seems that Maple does not know any of the description of the Math given
in the help pages for argument, though they are fundamental:

  abs(argument(exp(y*I))) <= Pi; # assuming (y::real);
  is(%) assuming (y::real);

                                 FAIL

  y = argument(exp(y*I)); 
  is(%) assuming (-Pi < y , y <= Pi);

                                 FAIL

Your suggestion goes twowards the 'unwinding number' unwindK, may be post
some on that the next days (since I wanted to have 'catalogue' similar to
the article of Aslaksen you notified me some days ago).

Usually I do not use it (because I forget the syntax, though for me it seems clearer than the standard),
one gets it by copy & paste on the result convert/piecewise.

And since the above turned out to be the essential problem in a longer sheet I just did that.

'Yes' in the sense of modulo 2*Pi.

If argument is RealRange(Open(-Pi),Pi) and especially is real then evalc of it should not alter that.

The issue seems to be the composition evalc@argument@exp.

Example:
 

  argument(exp(y*I));
  eval(%, y= 2*Pi);
                                  0

evalc of it is 0, not 2*Pi

'Yes' in the sense of modulo 2*Pi.

If argument is RealRange(Open(-Pi),Pi) and especially is real then evalc of it should not alter that.

The issue seems to be the composition evalc@argument@exp.

Example:
 

  argument(exp(y*I));
  eval(%, y= 2*Pi);
                                  0

evalc of it is 0, not 2*Pi

Thank you, I was too hasty and forgot it, sorry.

Of course I did not only want to let everybody know I like his work ...