Definitions
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 n. A fixed point.
Etymologies
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Examples

Action signature, we'll call a fixpoint method called Fix:

Reiter 1980 provides a fixpoint definition of the extensions of such a theory, and develops the theoretical groundwork for the approach, proving a number of the basic theorems.

Reiter 1980 use fixpoint definitions to solve the problem.

The solution to the functional equation is a fixpoint where the expectation function and the pricing function coincide.

To write an anonymous recursive function, we use the same fixpoint technique as we saw before.

The type of the intermediate function definition is quite impressive due to the fixpoint structure, but the essence of the function is quite easy to grasp:

We have a generic fixpoint method called "Fix", allowing us to define the factorial function (amongst others of course) as follows:

Y combinator , a fixpoint combinator created by lambda calculus high priests.

Our proof of the existence of types (computed by fixpoint of a typing operator) does not rely on metric properties, but on the fact that the identity is the limit of a sequence of projection terms.

Although McDermott and Doyle's terminology is different from Reiter's, the logical ideas are very similar ” the essence of their approach, like Reiter's, is a fixpoint definition of the extensions of a nonmonotonic logic.
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