# Properties/Invariants

> The requirement that the general properties or invariants a function must satisfy be defined.

Record: `lexicon:properties-invariants`
Kind: constraint
Layer: [Computation Core](https://banes-lab.com/records/layer/computation-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-properties-invariants

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [No Side Effects](https://banes-lab.com/records/lexicon/no-side-effects.md) and before [Value Semantics](https://banes-lab.com/records/lexicon/value-semantics.md).

## Category

- [Correctness / Determinism / Verification](https://banes-lab.com/records/lexicon-category/correctness-determinism-verification.md)

## Required by

- [Property-Based Testing](https://banes-lab.com/records/architecture/property-based-testing.md)

## Linked from

- [Correctness / Determinism / Verification](https://banes-lab.com/ontology/principles/architecture-category-correctness-determinism-verification.md)