Pith Number

pith:VDPYFWIL

pith:2010:VDPYFWILWXHDFAZCZJ6TDODGSU

not attested not anchored not stored refs pending

A Strange M\`enage \'A Trois

Sidney van den Bergh

arxiv:1012.3492 v1 · 2010-12-15 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VDPYFWILWXHDFAZCZJ6TDODGSU}

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	2026-05-18T04:33:06.630377Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8df82d90bb5ce328322ca7d31b8669509653e5e3bf027ce0b2d276d49838c67

Aliases

arxiv: 1012.3492 · arxiv_version: 1012.3492v1 · doi: 10.48550/arxiv.1012.3492 · pith_short_12: VDPYFWILWXHD · pith_short_16: VDPYFWILWXHDFAZC · pith_short_8: VDPYFWIL

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/VDPYFWILWXHDFAZCZJ6TDODGSU \
  | 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: a8df82d90bb5ce328322ca7d31b8669509653e5e3bf027ce0b2d276d49838c67

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d04510cd6bb39df037cdb79d688bc27fa9da8ffba79ce8376cc6b8f88882300",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-12-15T23:22:58Z",
    "title_canon_sha256": "1a4432e2e5580d4c832160e523ec8d17541e253a1d9c0bda131b8b7a9757eed2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.3492",
    "kind": "arxiv",
    "version": 1
  }
}