Urge and urge and urge,
Always the procreant urge of the world.

— Walt Whitman • Leaves of Grass

Example 1. A Square Rigging

Returning to the universe of discourse based on a single feature suppose we are given the initial condition and the second order differential law   Since the equation is logically equivalent to the disjunction we may infer two possible trajectories, as shown in the following Table.

In either case the state is a stable attractor or terminal condition for both starting points.

Resources

• Differential Logic and Dynamic Systems
• Differential Logic • A Square Rigging

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