Pith Number

pith:USCU3TEQ

pith:2015:USCU3TEQW6P2RTMWLQYMQHG4ND

not attested not anchored not stored refs pending

On the Cosmic Evolution of Fe/Mg in QSO Absorption Line Systems

Arjun Dey, Guangtun Ben Zhu, Joshua Suresh, Kate H. R. Rubin, Paul Torrey

arxiv:1503.06792 v2 · 2015-03-23 · 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{USCU3TEQW6P2RTMWLQYMQHG4ND}

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	2026-05-18T01:55:32.387300Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4854dcc90b79fa8cd965c30c81cdc68e62eb32453974b1e88cc741acfcd86d9

Aliases

arxiv: 1503.06792 · arxiv_version: 1503.06792v2 · doi: 10.48550/arxiv.1503.06792 · pith_short_12: USCU3TEQW6P2 · pith_short_16: USCU3TEQW6P2RTMW · pith_short_8: USCU3TEQ

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/USCU3TEQW6P2RTMWLQYMQHG4ND \
  | 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: a4854dcc90b79fa8cd965c30c81cdc68e62eb32453974b1e88cc741acfcd86d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b7f6c588fb707311c90dc0695b87317e4fb012427d1d674c8c3189b77713320",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-03-23T20:00:20Z",
    "title_canon_sha256": "a3d4802d3b7c0c2c7191ac9b716c718ca72983d8cc94fbd9be78bade79ac7e5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.06792",
    "kind": "arxiv",
    "version": 2
  }
}