tions follows (chapter 4), and the last chapter ( 5) deals with technicalities of
installing Jasymca on computers and mobile devices.
Working with Jasymca
Your computer must be equipped with a recent Java-Version (≥ 1, 5). No further
installation is required: Just visit the Jasymca-homepage  to start the program.
Of course, you can also use a local installation on any suitable system, see chap-
ter 5 for an installation guide.
Jasymca starts up in Octave-mode. Commands are entered using the keyboard
in the textinput ﬁeld in the lower part of the window. The results are displayed
and saved in the upper large textarea. The zoom-function in the main menu adjusts
font size. The buttons
recall earlier commands (scrolling the command
history). The same operation is acieved by typing the arrow keys of the keyboard,
and is an importand aid for efﬁcient working.
starts a 5-minutes demonstration of Jasymca’s capabilities.
In the following examples and exercises the verbatim response of Jasymca is dis-
played; to repeat the results you have to copy the text after the prompt (
the textinputﬁeld and press enter.
Numbers are entered in the usual Computer format: with optional decimalpoint
and decimal exponent following the letter
). The numbers 5364 and
−1.723478265342 · 10
should be entered like:
ans = 5364
ans = -1.7235E12
Most of the time these will be stored as ﬂoating point data (double, IEEE standard
754). They are rounded to 5 signiﬁcant digits for display, but for calculations
the full precision of this format is always preserved (15-16 decimal digits). By
switching the format (
) all signiﬁcant places are displayed.
>> format long
ans = -1.723478265342E12