# Digital filters (Mathematics) { "id": "S85037977", "title": "Digital filters (Mathematics)", "url": "/topics/S85037977", "kind": "topic-directory", "aeo_cohort": "topic-directory", "provider": "lcsh", "revision": "7fc584709315a968", "catalogue_revision": "f050b5d4780b1289", "numeric_address": "900733394558797376", "address_version": "morton4x16-v1", "coordinates": [ 0, 20, 17998, 25600 ], "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/sh85037977 No owner-reviewed local answer yet.