Pith Number

pith:NV5H5GCG

pith:2019:NV5H5GCGS3KRP3HBZGBXEOI5DH

not attested not anchored not stored refs pending

Effect of richness on AGN and star formation activities in SDSS galaxy groups

2), (2) Changzhou University, (3) University of Science, China, China), Feng Li (1, Min Bao (1), Qi-Rong Yuan (1), Technology of China, Wei-Hao Bian (1) ((1) Nanjing Normal University, Yi-Zhou Gu (1), Zhi-Cheng He (3)

arxiv:1901.07421 v1 · 2019-01-22 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NV5H5GCGS3KRP3HBZGBXEOI5DH}

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	2026-05-17T23:54:15.190707Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d7a7e984696d517ece1c98372391d19faf2cdd273aba570b0bac0918c20aebe

Aliases

arxiv: 1901.07421 · arxiv_version: 1901.07421v1 · doi: 10.48550/arxiv.1901.07421 · pith_short_12: NV5H5GCGS3KR · pith_short_16: NV5H5GCGS3KRP3HB · pith_short_8: NV5H5GCG

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/NV5H5GCGS3KRP3HBZGBXEOI5DH \
  | 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: 6d7a7e984696d517ece1c98372391d19faf2cdd273aba570b0bac0918c20aebe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "398ad0f5b5eb87bbef52c94ade02affac26cbb13a3757c7686abe8f4226a979c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-01-22T15:37:05Z",
    "title_canon_sha256": "33b59d17c81461c11c2ecab31f47833232c80a1c7c735db1aff874ce694f33ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.07421",
    "kind": "arxiv",
    "version": 1
  }
}