[Gmsh] Surface numbering

[Philippe Ackerer]

Hi
Could someone explain me how the surfaces are numbered ?
Take for example cube.geo in the provided demos. Since I need the 
surface numbers, I would like to have them *without* the GUI.
Thanks

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Philippe ACKERER
LHyGeS UMR 7517 CNRS-UdS Engees
1, rue Blessig
67000 STRASBOURG
Tel: +33 (0)388 560 561

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