English: A multi-surface alongside the corresponding "rate-of-gain" function. When traversing any edge, the net amount of surfaces penetrated in the preferred direction is the "gain" from the traversal. Positive gain is generated by moving from the green end of an edge to the red end, and the depth of the colors indicates the amount of gain.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
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share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.