{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:JBKORUBCSHYA4GIGK5ISFTHTC3","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"b088e929d87919179103c634756ca8d67beecdc4e703c8af99a46a59ea01eba9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-04-07T19:37:22Z","title_canon_sha256":"c46464211c9956e81d7d641aff5d6e0dddabb66f28ef4d1d402649daf5ecbac5"},"schema_version":"1.0","source":{"id":"1904.03718","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.03718","created_at":"2026-05-17T23:49:08Z"},{"alias_kind":"arxiv_version","alias_value":"1904.03718v1","created_at":"2026-05-17T23:49:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.03718","created_at":"2026-05-17T23:49:08Z"},{"alias_kind":"pith_short_12","alias_value":"JBKORUBCSHYA","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"JBKORUBCSHYA4GIG","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"JBKORUBC","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:9d4a86b74733eebaca82ffdba50b8f01827c5dc12bcf05a85dd83728d19e2fc7","target":"graph","created_at":"2026-05-17T23:49:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Single-ended circuit topologies, and a theorem for the development thereof, are presented with which one may realize constant-resistance (or reflectionless) filters, having ideally zero reflection coefficient at all frequencies and from all ports, suitable for elliptic and pseudo-elliptic filter responses. The proposed theorem produces topologies of a type known as the coupled-ladder, which has been previously studied for only polynomial responses (e.g. Butterworth, Chebyshev, etc.). A comparison between these topologies and another classical approach known as the economy bridge reveals that t","authors_text":"Augusto Guilabert, Matthew Morgan, Tod Boyd","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-04-07T19:37:22Z","title":"Reflectionless Filters for Generalized Transmission Functions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.03718","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:543b6a6dc06753cdd7ddc976c2a13097e1e1defd85028174bdb16912912e72a7","target":"record","created_at":"2026-05-17T23:49:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"b088e929d87919179103c634756ca8d67beecdc4e703c8af99a46a59ea01eba9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-04-07T19:37:22Z","title_canon_sha256":"c46464211c9956e81d7d641aff5d6e0dddabb66f28ef4d1d402649daf5ecbac5"},"schema_version":"1.0","source":{"id":"1904.03718","kind":"arxiv","version":1}},"canonical_sha256":"4854e8d02291f00e1906575122ccf316c9c2a98fe80394112e8867eb76bd2779","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4854e8d02291f00e1906575122ccf316c9c2a98fe80394112e8867eb76bd2779","first_computed_at":"2026-05-17T23:49:08.343584Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:08.343584Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eDl9KmZz/+zDeQ7jvCScg9fLSQPR0RU1Xp0zOzLfvFNpGTZyhvXD29kVn0MdLtQJjE2oHdV+HkrNCoNrtNMMCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:08.344225Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.03718","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:543b6a6dc06753cdd7ddc976c2a13097e1e1defd85028174bdb16912912e72a7","sha256:9d4a86b74733eebaca82ffdba50b8f01827c5dc12bcf05a85dd83728d19e2fc7"],"state_sha256":"df499662e429f2bd13cbaacf64f28c4852abec810fa6fb986bb310917fb53d06"}