Geometry and Fifteen Fundamental Properties

Christopher Alexander recognized the importance of the geometry of centers and for years he was looking for the common structural features among buildings, paintings, streets, carpets, doors, windows, etc. which have "life" and "wholeness". He identified fifteen structural features which appear again and again in things which have life, and concluded that these are the ways in which centers can help each other in space. The fifteen fundamental properties act as a glue in creating a unified and connected whole.
Areas of focus:
Structure of Space
Guiding idea:
Centers and Fields of Centers
Thoughts and Arguments Explored and Developed

The fifteen fundamental properties
The fifteen properties in nature
Centers and local symmetries
The density of local symmetries
Simplicity
Symmetry, simplicity, and just what is required

References
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