Pith Number

pith:UBNIG2HO

pith:2019:UBNIG2HOXYVMQQ77CQDQI3GJVO

not attested not anchored not stored refs pending

The Chemical Evolution of Carbon, Nitrogen, and Oxygen in Metal-Poor Dwarf Galaxies

Danielle A. Berg, Dawn K. Erb, Evan D. Skillman, Kristen B.W. McQuinn, Richard B.C. Henry

arxiv:1901.08160 v1 · 2019-01-23 · 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{UBNIG2HOXYVMQQ77CQDQI3GJVO}

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	2026-05-17T23:49:39.492019Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a05a8368eebe2ac843ff1407046cc9abacb3bd8d59030fc92fff4382bb4964dc

Aliases

arxiv: 1901.08160 · arxiv_version: 1901.08160v1 · doi: 10.48550/arxiv.1901.08160 · pith_short_12: UBNIG2HOXYVM · pith_short_16: UBNIG2HOXYVMQQ77 · pith_short_8: UBNIG2HO

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/UBNIG2HOXYVMQQ77CQDQI3GJVO \
  | 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: a05a8368eebe2ac843ff1407046cc9abacb3bd8d59030fc92fff4382bb4964dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bfebbed3650b2327d83e2d79a2fe62cae25f59454be87b4cf718691bce97a50",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-01-23T22:52:45Z",
    "title_canon_sha256": "cb661e61f949c6dde5c5967c43c3069c0f3a944a00205f0398dd453b349835b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.08160",
    "kind": "arxiv",
    "version": 1
  }
}