9 23 Further Notes and Views

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Back to 9 23.

Symmetrical decorative knot
With crossings on 3x3 grid
Depiction with two axes of symmetry
Mongolian ornament (two crossings are unnecessary)
Mongolian ornament, sum of two 9.23
Logo of the ICMC-USP, Brazil
Other depicture with central symmetry by Alain Esculier