This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionPythagorean pairs.svg
English: This is a demonstration of traditionalist based bias as one may argue that Pythagorean triples should be represented as (a, b, c). In fact c is redundant because it can be calculated as square root of (a2 + b2). On the other hand it is a bias approach to reduce the inherent properties of the nodes to a single key as done in 2011 in file:Pythagorean.tree.svg.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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.
Pythagorean pairs presented as a succession of the generations 1 to generation 4 of the related primitive [[:en:Pythagorean triple|]]s as an alternative codifications of the Berggrens's three