# Cancellation theory (Group theory) { "id": "S2001003064", "title": "Cancellation theory (Group theory)", "url": "/topics/S2001003064", "kind": "topic-directory", "aeo_cohort": "topic-directory", "provider": "lcsh", "revision": "b4634cbfd8759d8e", "catalogue_revision": "f050b5d4780b1289", "numeric_address": "9836987788376039938", "address_version": "morton4x16-v1", "coordinates": [ 0, 477, 5000, 57344 ], "answer_status": "Directory metadata; local answer requires separate source review", "truth_status": "Subject descriptor, not a factual answer or a demonstrated knowledge gap" } Directory metadata is not a factual answer or evidence of a global knowledge gap. Source: https://id.loc.gov/authorities/subjects/sh2001003064 No owner-reviewed local answer yet.