Half as many people will not support half as many enterprises In a given geographical territory, half as many people will not support half as many such enterprises spaced at twice the distance. When distance inconvenience sets in, the small, the various and the personal wither away. Jane Jacobs, The Death and Life of Great American Cities densitydistancegeographybusinesseconomics
Grain Shapes and Other Metallurgical Applications of Topology An Essay from A Search for Structure by Cyril Stanley Smith The boundary can tell much about what is inside topologymetal