Pith Number

pith:QYRJEJF4

pith:2011:QYRJEJF4WLYYPATH74TO35XSE2

not attested not anchored not stored refs pending

The most metal-poor damped Lyman-alpha systems: Insights into chemical evolution in the very metal-poor regime

Astronomy, Charles C. Steidel (California Institute of Technology), Gwen C. Rudie (California Institute of Technology), Max Pettini (Institute of Astronomy, Poul E. Nissen (Department of Physics, Ryan Cooke (Institute of Astronomy, University of Aarhus), University of Cambridge)

arxiv:1106.2805 v2 · 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{QYRJEJF4WLYYPATH74TO35XSE2}

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	2026-05-18T02:01:37.284521Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86229224bcb2f1878267ff26edf6f226bcd1902dbef9b8fc325a79208c14eefc

Aliases

arxiv: 1106.2805 · arxiv_version: 1106.2805v2 · doi: 10.48550/arxiv.1106.2805 · pith_short_12: QYRJEJF4WLYY · pith_short_16: QYRJEJF4WLYYPATH · pith_short_8: QYRJEJF4

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/QYRJEJF4WLYYPATH74TO35XSE2 \
  | 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: 86229224bcb2f1878267ff26edf6f226bcd1902dbef9b8fc325a79208c14eefc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "832af63a11a2a293c60c0086406701c8dfd33edb51d543c6273931d6fab64f63",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-06-14T20:00:01Z",
    "title_canon_sha256": "9478308ad6c9282fa75a304cca57b1c9d378c129d559869a6db9545aeb426091"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.2805",
    "kind": "arxiv",
    "version": 2
  }
}