Pith Number

pith:WY7JDLFU

pith:2010:WY7JDLFUBQ67RGAC4O2YUBRKVT

not attested not anchored not stored refs pending

Substellar companions and the formation of hot subdwarf stars

A. Tillich, B. N. Barlow, B. T. Gaensicke, E. W. Guenther, H. Hirsch, L. Classen, P. F. L. Maxted, R. H. Oestensen, R. Napiwotzki, S. Geier, S. J. O'Toole, T. Kupfer, T. R. Marsh, U. Heber, V. Schaffenroth

arxiv:1012.3839 v2 · 2010-12-17 · 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{WY7JDLFUBQ67RGAC4O2YUBRKVT}

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	2026-05-18T02:04:23.233439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b63e91acb40c3df89802e3b58a062aacd087a473ef3b1008f8af8d8a692d7dbf

Aliases

arxiv: 1012.3839 · arxiv_version: 1012.3839v2 · doi: 10.48550/arxiv.1012.3839 · pith_short_12: WY7JDLFUBQ67 · pith_short_16: WY7JDLFUBQ67RGAC · pith_short_8: WY7JDLFU

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/WY7JDLFUBQ67RGAC4O2YUBRKVT \
  | 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: b63e91acb40c3df89802e3b58a062aacd087a473ef3b1008f8af8d8a692d7dbf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5769e3368b22d91c3d5bf74642541d3f0183e4221860737b7bfb07a8ac87cb2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-12-17T10:04:26Z",
    "title_canon_sha256": "56bd6982be338195b45b6ec410ac67a7de21b6c51e8f05a6d87699841a99b265"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.3839",
    "kind": "arxiv",
    "version": 2
  }
}