Pith Number

pith:2FUCUGKP

pith:2011:2FUCUGKPYPBM4HEJYS3UC52ORB

not attested not anchored not stored refs pending

The Carbon Content of Intergalactic Gas at z=4.25 and its Evolution Toward z=2.4

Robert A. Simcoe

arxiv:1106.2810 v1 · 2011-06-14 · 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{2FUCUGKPYPBM4HEJYS3UC52ORB}

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	2026-05-18T02:01:37.260377Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1682a194fc3c2ce1c89c4b741774e8857afca19caa6bab3451a74022ced5cd4

Aliases

arxiv: 1106.2810 · arxiv_version: 1106.2810v1 · doi: 10.48550/arxiv.1106.2810 · pith_short_12: 2FUCUGKPYPBM · pith_short_16: 2FUCUGKPYPBM4HEJ · pith_short_8: 2FUCUGKP

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/2FUCUGKPYPBM4HEJYS3UC52ORB \
  | 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: d1682a194fc3c2ce1c89c4b741774e8857afca19caa6bab3451a74022ced5cd4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af6fcc48e7825cd146d485868e6cfed51536e44d75beb10639fbe4bc497b3563",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-06-14T20:00:07Z",
    "title_canon_sha256": "89161bd2c547dcb5e271ff11ecf7075c6fe109824d3a36e2b0fe36ffd48641b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.2810",
    "kind": "arxiv",
    "version": 1
  }
}