“Linear relationships can be captured with a straight line on a graph. Linear relationships are easy to think about…. Linear equations are solvable… Linear systems have an important modular virtue: you can take them apart, and put them together again — the pieces add up.”

—  James Gleick, book Chaos: Making a New Science

Hanssen commented: "Following distinctions between linear and nonlinear systems from James Gleick's 1987 book on chaos theory may be helpful."
Source: Chaos: Making a New Science, 1987, p. 23 as cited in: James R. Hansen (2004), Trees of Texas: An Easy Guide to Leaf Identification, p. 246

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James Gleick15
American author, journalist, and biographer 1954

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