Pith Number

pith:MQBQGQOE

pith:2018:MQBQGQOEUOOXQEOPTJUNHG4D73

not attested not anchored not stored refs pending

Chemically defining the building blocks of the Earth

Marc D. Lipella, Richard D. Ash, Takashi Yoshizaki, Tetsuya Yokoyama, William F. McDonough

arxiv:1812.11717 v2 · 2018-12-31 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MQBQGQOEUOOXQEOPTJUNHG4D73}

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	2026-05-17T23:56:27.349392Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64030341c4a39d7811cf9a68d39b83fedb1e1314bebaef88b35fe68a20556042

Aliases

arxiv: 1812.11717 · arxiv_version: 1812.11717v2 · doi: 10.48550/arxiv.1812.11717 · pith_short_12: MQBQGQOEUOOX · pith_short_16: MQBQGQOEUOOXQEOP · pith_short_8: MQBQGQOE

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/MQBQGQOEUOOXQEOPTJUNHG4D73 \
  | 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: 64030341c4a39d7811cf9a68d39b83fedb1e1314bebaef88b35fe68a20556042

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19f0c940ed96dd8c3bf9b2bf2fa07baf9916af65b2aac49f0fa997e9d93876ca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-12-31T08:14:00Z",
    "title_canon_sha256": "fff45a313471fd235b9d6a1cf597069456a5da54c1fea53f4b71bf1580207b9a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.11717",
    "kind": "arxiv",
    "version": 2
  }
}