Revolutionary knowledge-based programming language.
The preeminent environment for any technical workflows.
Semantic framework for real-world data.
Central infrastructure for Wolfram's cloud products & services.
Software engine implementing the Wolfram Language.
Instant deployment across cloud, desktop, mobile, and more.
Technology-enabling science of the computational universe.
Knowledge-based, broadly deployed natural language.
Curated computable knowledge powering Wolfram|Alpha.
returns True if expr is a valid permutation list and False otherwise.
A valid permutation list:
Invalid permutation lists:
PermutationList PermutationCycles PermutationCyclesQ