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The stationary-action principle – also known as the principle of least action – is a variational principle that, when applied to the action of a mechanical system, yields the equations of motion for that system. The principle states that the trajectories (i.e. the solutions of the equations of motion) are stationary points of the system's action functional. The term "least action" is a historical misnomer since the principle has no minimality requirement: the value of the action functional need not be minimal (even locally) on the trajectories.

Stationary-Action Principle - Wikipedia

configuration space

Figuring out the right product is the innovator’s job, not the customer’s job. The customer only knows what she thinks she wants based on her experience with the current product. The innovator can take into account everything that’s possible, often going against what she knows to be true. This requires a combination of knowledge, skill, and courage.

Tren Griffin - A Dozen Lessons for Entrepreneurs

2017, Columbia University Press

The man of knowledge must be able not only to love his enemies, but also to hate his friends.

Thus Spake Zarathustra

Friedrich Wilhelm Nietzsche

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