Pith Number

pith:VP2PILZG

pith:2019:VP2PILZGHCBL3ZPBLBO2C7UYDC

not attested not anchored not stored refs pending

Black holes in Einstein-Gauss-Bonnet gravity with a background of modified Chaplygin gas

Bo Chen, Li-Li Xing, Xiang-Qian Li

arxiv:1908.09827 v2 · 2019-08-23 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VP2PILZGHCBL3ZPBLBO2C7UYDC}

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	2026-07-05T09:07:41.650563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abf4f42f263882bde5e1585da17e98189373a563b5c31f8f8eb8ce5c10e0b2c3

Aliases

arxiv: 1908.09827 · arxiv_version: 1908.09827v2 · doi: 10.48550/arxiv.1908.09827 · pith_short_12: VP2PILZGHCBL · pith_short_16: VP2PILZGHCBL3ZPB · pith_short_8: VP2PILZG

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/VP2PILZGHCBL3ZPBLBO2C7UYDC \
  | 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: abf4f42f263882bde5e1585da17e98189373a563b5c31f8f8eb8ce5c10e0b2c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42f2f2c10e69937026994549b342d5cf22c9b5dd1d2b5788c22e29a281016802",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2019-08-23T16:54:05Z",
    "title_canon_sha256": "924c0b65fac90e423c6b376c96a22877797afe406ecea89d3a532873c4c0949e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.09827",
    "kind": "arxiv",
    "version": 2
  }
}