Pith Number

pith:UBKRYN4H

pith:2018:UBKRYN4HWDYGZME53MEUUXOUHM

not attested not anchored not stored refs pending

Copper abundance from Cu I and Cu II lines in metal-poor star spectra: NLTE vs LTE

A.V. Zhukova, S.A. Korotin, S.M. Andrievsky

arxiv:1807.08972 v1 · 2018-07-24 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UBKRYN4HWDYGZME53MEUUXOUHM}

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	2026-05-18T00:09:57.208965Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0551c3787b0f06cb09ddb094a5dd43b13daf2ed2cb7933cab3055a68371112d

Aliases

arxiv: 1807.08972 · arxiv_version: 1807.08972v1 · doi: 10.48550/arxiv.1807.08972 · pith_short_12: UBKRYN4HWDYG · pith_short_16: UBKRYN4HWDYGZME5 · pith_short_8: UBKRYN4H

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/UBKRYN4HWDYGZME53MEUUXOUHM \
  | 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: a0551c3787b0f06cb09ddb094a5dd43b13daf2ed2cb7933cab3055a68371112d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2d64aac8c5ae199cc984301b3481c00178d9fe94a1e86fa616ec0c0da306a0c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-07-24T09:03:12Z",
    "title_canon_sha256": "4b9e6494274c0614f0d46091ab10e875c5f0b667f09ff8a8fd2b922226ac6799"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.08972",
    "kind": "arxiv",
    "version": 1
  }
}