Pith Number

pith:Q342RM37

pith:2019:Q342RM37WAUHYVXZDCZ766F4GG

not attested not anchored not stored refs pending

Unsupervised frequency clustering algorithm for null space estimation in wideband spectrum sharing networks

Danijela Cabric, Shailesh Chaudhari

arxiv:1903.07656 v1 · 2019-03-18 · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q342RM37WAUHYVXZDCZ766F4GG}

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	2026-05-17T23:50:54.442105Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86f9a8b37fb0287c56f918b3ff78bc3198763fbb5b5c7ac5e798c1ec6ffdf12c

Aliases

arxiv: 1903.07656 · arxiv_version: 1903.07656v1 · doi: 10.48550/arxiv.1903.07656 · pith_short_12: Q342RM37WAUH · pith_short_16: Q342RM37WAUHYVXZ · pith_short_8: Q342RM37

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/Q342RM37WAUHYVXZDCZ766F4GG \
  | 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: 86f9a8b37fb0287c56f918b3ff78bc3198763fbb5b5c7ac5e798c1ec6ffdf12c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11719b43a4ea81a16f6beb75fbf78425af1a637c3be8a4e705b87d82476f881b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2019-03-18T18:31:40Z",
    "title_canon_sha256": "a201faf000be7ea6e50244e2dcbcc1c7867b026bfe884b8b9fd94704d4c6f7e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.07656",
    "kind": "arxiv",
    "version": 1
  }
}