Pith Number

pith:HWAD2IFO

pith:2015:HWAD2IFOUMTOEF5LQUN6NISJEW

not attested not anchored not stored refs pending

The Chemical Evolution of Very Metal-Poor Damped Lyman-$\alpha$ Systems

David Webster, Joss Bland-Hawthorn, Ralph S. Sutherland

arxiv:1504.02480 v1 · 2015-04-09 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HWAD2IFOUMTOEF5LQUN6NISJEW}

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	2026-05-18T02:04:05.633879Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d803d20aea326e217ab851be6a24925a856fd2876df41c81ce78584038b2cd5

Aliases

arxiv: 1504.02480 · arxiv_version: 1504.02480v1 · doi: 10.48550/arxiv.1504.02480 · pith_short_12: HWAD2IFOUMTO · pith_short_16: HWAD2IFOUMTOEF5L · pith_short_8: HWAD2IFO

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/HWAD2IFOUMTOEF5LQUN6NISJEW \
  | 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: 3d803d20aea326e217ab851be6a24925a856fd2876df41c81ce78584038b2cd5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29416a03d9f1163a01b15d82f17eccb842b8f210cceb4ba0ea75fc6cd9eb0f1e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-04-09T20:01:22Z",
    "title_canon_sha256": "05098e145895e6461ccc333f4a5d8f42d99071ca57679fa48f07a5484aef7142"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.02480",
    "kind": "arxiv",
    "version": 1
  }
}