Pith Number

pith:EWQ2DWET

pith:2012:EWQ2DWET5WZE4B64DBIXLBGMFR

not attested not anchored not stored refs pending

The Origin and Evolution of Metallicity Gradients: Probing the Mode of Mass Assembly at z=2

Eric Jullo, Johan Richard, Richard S. Ellis, Tucker Jones

arxiv:1207.4489 v1 · 2012-07-18 · 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{EWQ2DWET5WZE4B64DBIXLBGMFR}

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	2026-05-18T01:56:16.601221Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25a1a1d893edb24e07dc18517584cc2c55841d2da1f08fecfe94df39f8be19ff

Aliases

arxiv: 1207.4489 · arxiv_version: 1207.4489v1 · doi: 10.48550/arxiv.1207.4489 · pith_short_12: EWQ2DWET5WZE · pith_short_16: EWQ2DWET5WZE4B64 · pith_short_8: EWQ2DWET

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/EWQ2DWET5WZE4B64DBIXLBGMFR \
  | 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: 25a1a1d893edb24e07dc18517584cc2c55841d2da1f08fecfe94df39f8be19ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8bccbd63b3b0f93715af4a51c6ed6e1d22ef8fac163cee87bbc7b75705827b85",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-07-18T20:03:23Z",
    "title_canon_sha256": "a29627bcfe06b1ef8a98fd3c8a3cbe9db737b589926bf0eb76533dcfe72911dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.4489",
    "kind": "arxiv",
    "version": 1
  }
}