Pith Number

pith:I4J6CMD7

pith:2018:I4J6CMD7QR5FS2KN5FUYNM5S6F

not attested not anchored not stored refs pending

Reflectionless Filter Topologies Supporting Arbitrary Ladder Prototypes

Matthew A. Morgan, Tod A. Boyd, Wavley M. Groves III

arxiv:1807.00021 v1 · 2018-06-29 · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I4J6CMD7QR5FS2KN5FUYNM5S6F}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:11:56.372863Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4713e1307f847a59694de96986b3b2f1639040c5950bec137de37c54a37bbfdc

Aliases

arxiv: 1807.00021 · arxiv_version: 1807.00021v1 · doi: 10.48550/arxiv.1807.00021 · pith_short_12: I4J6CMD7QR5F · pith_short_16: I4J6CMD7QR5FS2KN · pith_short_8: I4J6CMD7

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/I4J6CMD7QR5FS2KN5FUYNM5S6F \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 4713e1307f847a59694de96986b3b2f1639040c5950bec137de37c54a37bbfdc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1eb22cc7efcf08db552c62080cc9fbe56608af553b1f13d9d1bf274c75fc5a6c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-06-29T18:16:25Z",
    "title_canon_sha256": "0d98fd2b239826d3e19c41e463f2f374967f5ce53a9b53159229dd35751d6e5f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.00021",
    "kind": "arxiv",
    "version": 1
  }
}