Pith Number

pith:7V7WL6CZ

pith:2013:7V7WL6CZJVQ6DDDUP4CF5UZNG7

not attested not anchored not stored refs pending

On the origin of orbital period change in WY Cancri: a genuine angular momentum loss?

Wen-Cong Chen

arxiv:1304.2157 v1 · 2013-04-08 · 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{7V7WL6CZJVQ6DDDUP4CF5UZNG7}

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	2026-05-18T01:50:41.742505Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd7f65f8594d61e18c747f045ed32d37e2905ec6c3dbcedafdf453d6c9380bb8

Aliases

arxiv: 1304.2157 · arxiv_version: 1304.2157v1 · doi: 10.48550/arxiv.1304.2157 · pith_short_12: 7V7WL6CZJVQ6 · pith_short_16: 7V7WL6CZJVQ6DDDU · pith_short_8: 7V7WL6CZ

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/7V7WL6CZJVQ6DDDUP4CF5UZNG7 \
  | 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: fd7f65f8594d61e18c747f045ed32d37e2905ec6c3dbcedafdf453d6c9380bb8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bafc59e69fa56ca4682b5260ebdd9ed1e5a1441977f592a088d37e38dff2088",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-04-08T10:31:58Z",
    "title_canon_sha256": "cbb3bcbf64d0784a3263337a46c7d7b224603e7365037923a3c4206439d741d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2157",
    "kind": "arxiv",
    "version": 1
  }
}