Pith Number

pith:6PI4FDJM

pith:2018:6PI4FDJM4XE6ZPCHOFXFX747OE

not attested not anchored not stored refs pending

Earth's chondritic Th/U: negligible fractionation during accretion, core formation, and crust - mantle differentiation

Meng Guo, Ond\v{r}ej \v{S}r\'amek, Scott A. Wipperfurth, William F. McDonough

arxiv:1801.05473 v2 · 2018-01-16 · physics.geo-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6PI4FDJM4XE6ZPCHOFXFX747OE}

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	2026-05-17T23:39:27.644325Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3d1c28d2ce5c9ecbc47716e5bff9f7107edd7a39c0b94d26431704b62e1e173

Aliases

arxiv: 1801.05473 · arxiv_version: 1801.05473v2 · doi: 10.48550/arxiv.1801.05473 · pith_short_12: 6PI4FDJM4XE6 · pith_short_16: 6PI4FDJM4XE6ZPCH · pith_short_8: 6PI4FDJM

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/6PI4FDJM4XE6ZPCHOFXFX747OE \
  | 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: f3d1c28d2ce5c9ecbc47716e5bff9f7107edd7a39c0b94d26431704b62e1e173

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80c4ca88b695de7246f295b7aea7bd628331f45821894840a716a980f26adbc4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.geo-ph",
    "submitted_at": "2018-01-16T20:22:38Z",
    "title_canon_sha256": "4a521aaaec196c6bbcfe80c3749899074261e057e3601546096808884599ea94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.05473",
    "kind": "arxiv",
    "version": 2
  }
}