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Construction junctions are diamonds. They show where multiple structures must coexist on the same carrier and satisfy compatibility conditions.
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This is an authored directed relation from the source endpoint to the target endpoint.
Relation ID
function_to_self_map
Relation type
Impose axiom impose-axiom
Direction
source β target
Endpoint roles
source: Builds toward; target: Built from
Authored annotation
identify domain and codomain
Authored explanation
Restrict a function f:XβY by requiring Y=X. The resulting endofunction can be iterated, whereas an arbitrary function with different domain and codomain cannot be composed with itself.
How to interpret this relation type
Keep the existing data and select the subclass satisfying an additional law, existence condition, finiteness condition, or other property.
source: Representation / equivalence with; target: Representation / equivalence with
Authored annotation
iteration as discrete evolution
Authored explanation
A self-map generates an N-action by iteration, and specifying such a forward discrete action is equivalent to specifying its one-step map. A Z-action additionally requires an invertible map.
How to interpret this relation type
Reinterpret an object, pass to an equivalent presentation, or relate canonically corresponding structures; the carrier may change.