I tried to contact an author using the menu item more->contact autor.

I got the following back from postmaster@maplesoft.com

The IP-adress 199.71.183.16 (domain maplesoft.com) does not match the IP-adress of my mailprovider.

The authentification of the mailprovider works when I send directly from this mailprovider to gmail accounts.

Is this a known issue when sending via maplesoft.com or only temporary?

Is gmail too restrictive?

Does Maple provide any command/examples that can help verfying whether an analytic function or a time series (a sequence of numbers) is periodic?

I had a look at signal processing. In principle auto-correlation could be used for that purpose but I am interested in a command that outputs a period for a given allowable error or a graphical display that can help in an assessment.

Analytic convolution and analysis of the convolution terms for periodic conditions would be great for analytic functions.

I have no time (and limited skills) to program such things myself.

I am using the tab key to complete commands. Often I have to add a module to the command. On my keyboard typing ":-" is slow (for me) and interrupts the flow. I was wondering whether there is not a undocumented key or shortcut to insert ":-".

(I tried a second time hitting tab but this did not do anything. Would this be a good way to speed up typing?)

I can do that for a cylinder (in green below) but not for a box geometry.

Box_geometry_and_pendulum.msim

Using edit -> Find/Replace (or crtl-f) it is possible to earch for text composed of alpha numeric-characters. Maple finds all occurences in input an output.

For greek letters this works only for 1D Math input. Is there a way to find/search for greek symbols displayed on the GUI in 2D Math input and output like lambda in the below

?