ONE OF THE BASIC situationist practices is the dérive [literally: "drifting"], a technique of rapid passage through varied ambiances. Dérives involve playful-constructive behavior and awareness of psychogeographical effects, and are thus quite different from the classic notions of journey or stroll.
In a dérive one or more persons during a certain period drop their relations, their work and leisure activities, and all their other usual motives for movement and action, and let themselves be drawn by the attractions of the terrain and the encounters they find there. Chance is a less important factor in this activity than one might think: from a dérive point of view cities have psychogeographical contours, with constant currents, fixed points and vortexes that strongly discourage entry into or exit from certain zones."
Derive
In mathematics, to derive a statement is to use logic, starting from known facts, or at the very beginning, from axioms, to decide whether the statement is true or false.
Formally, if you have a set of axioms A, then a set of statements B are all said to be derived if they follow logically from statements in A. And further, a set of statements C are said to be derived if they follow from statements in A and B.
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