Pith Number

pith:I52DVGJL

pith:2015:I52DVGJLZQFCQ3FI2VNPMUQJXP

not attested not anchored not stored refs pending

The Physical Nature of the Most Metal-Poor Damped Lyman Alpha Systems

Renyue Cen (Princeton University), Sihan Yuan (Princeton University)

arxiv:1511.07060 v3 · 2015-11-22 · astro-ph.CO · 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{I52DVGJLZQFCQ3FI2VNPMUQJXP}

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	2026-05-18T01:22:10.069932Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

47743a992bcc0a286ca8d55af65209bbc50c574f634178b34d5fb74993c2c606

Aliases

arxiv: 1511.07060 · arxiv_version: 1511.07060v3 · doi: 10.48550/arxiv.1511.07060 · pith_short_12: I52DVGJLZQFC · pith_short_16: I52DVGJLZQFCQ3FI · pith_short_8: I52DVGJL

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/I52DVGJLZQFCQ3FI2VNPMUQJXP \
  | 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: 47743a992bcc0a286ca8d55af65209bbc50c574f634178b34d5fb74993c2c606

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8b965d62168613cb4c1637ae22b15aefc56a6c4627557912408b018e137ef86",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-11-22T19:44:42Z",
    "title_canon_sha256": "e35e1c27a55acfe74747684927be1bb09806d40ef2a0e9ad6be56ccbcdd77012"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.07060",
    "kind": "arxiv",
    "version": 3
  }
}