Pith Number

pith:K7EPEKOS

pith:2021:K7EPEKOSA4ABABSY4RIRMDNVT3

not attested not anchored not stored refs pending

OO Dra: an Algol-type binary formed through an extremely helium-poor mass accretion revealed by asteroseismology

Changqing Luo, Jie Su, Xiaobin Zhang, Xinghao Chen, Xuefei Chen, Xuzhi Li, Yan Li

arxiv:2108.02912 v1 · 2021-08-06 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K7EPEKOSA4ABABSY4RIRMDNVT3}

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	2026-07-05T03:26:04.116442Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

57c8f229d20700100658e451160db59efab83de6a60bef2274eef530fc240538

Aliases

arxiv: 2108.02912 · arxiv_version: 2108.02912v1 · doi: 10.48550/arxiv.2108.02912 · pith_short_12: K7EPEKOSA4AB · pith_short_16: K7EPEKOSA4ABABSY · pith_short_8: K7EPEKOS

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/K7EPEKOSA4ABABSY4RIRMDNVT3 \
  | 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: 57c8f229d20700100658e451160db59efab83de6a60bef2274eef530fc240538

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31e76fc87d97912ee375b9019079790c85b79115de0661e8113335fe6391e7e7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-08-06T01:56:49Z",
    "title_canon_sha256": "cf687cf756e8fc81e71e454aa4751fae60b67e296302b1f8feba7d0c4654bcab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.02912",
    "kind": "arxiv",
    "version": 1
  }
}