This is a demo interface to a full web-based CAS engine.
This CAS does not need any server,
engine of your browser (requires Firefox version 19 or later,
the latest version of Firefox is recommended for good performances).
The code of the CAS is 12M, it is downloaded once
compiled from native Giac/Xcas by emscripten).
code, and sometimes much much slower (e.g. more than 15 times slower
for computing a Groebner basis like cyclic7). Most of the time
it is however fast enough (that would justify a better interface...),
but it is recommended to run large computations with
Giac/Xcas, (c) B. Parisse, R. De Graeve, Institut Fourier,
Université de Grenoble I., licensed under the GPL3, for commercial
licenses contact us.
Program editor CodeMirror,
Initial Mathml and SVG code by J.P. Branchard.
A typical Xcas session will consist in entering commandlines that will
appear in the history. Sometimes you will also edit an already entered
command and reevaluate it.
The screen is divided in
A panel of buttons to load a session, see manuals and
configure. Once the history is non empty, additional buttons appear:
save or export session, a link that you can hit to clone a session
(for example if your session crashed) or copy/paste, history/trash
and variables handling.
The history (empty when you start) divided into levels. You can
move level up and down (button at the left). You can edit a level
and reevaluate it (press Enter). You can move one level to the
trash (press backspace button at the right), and empty the trash
or recover levels in the trash (panel of buttons above).
A commandline with buttons that will help you fill the
commandline. You can show the scientific keyboard (press the
keyboard button), then move the mouse near a button to have
a short explanation on the corresponding command. You can enter
the beginning of a command then press Tab or hit the ? button, this
will show completions in the history. If you entered a valid Xcas command,
a short online help will be displayed with examples, hit the
corresponding buttons to copy one example, modify arguments and hit
Enter to run the commandline. Additionnaly, in Firefox, right-click will show a
menu of many Xcas commands. See also below
for a few examples.
A last line of buttons that show or hide a program editor, the
3d graph canvas, and the console.