Pith Number

pith:QXPDUJOD

pith:2015:QXPDUJODPHDQCTNGKSRKQC2MOW

not attested not anchored not stored refs pending

The primordial deuterium abundance: subDLA system at $z_{\rm abs}=2.437$ towards the QSO J1444+2919

A.V. Ivanchik, D.A. Varshalovich, E.O. Zavarygin, K.N. Telikova, S.A. Balashev

arxiv:1511.01797 v1 · 2015-11-05 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QXPDUJODPHDQCTNGKSRKQC2MOW}

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.

Cited by

1 paper in Pith

Bipartite Solution to the Lithium Problem

Receipt and verification

First computed	2026-05-18T01:17:43.204892Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85de3a25c379c7014da654a2a80b4c75bcc0bb9b5e9b7ff5b855e5a067275af7

Aliases

arxiv: 1511.01797 · arxiv_version: 1511.01797v1 · doi: 10.48550/arxiv.1511.01797 · pith_short_12: QXPDUJODPHDQ · pith_short_16: QXPDUJODPHDQCTNG · pith_short_8: QXPDUJOD

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/QXPDUJODPHDQCTNGKSRKQC2MOW \
  | 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: 85de3a25c379c7014da654a2a80b4c75bcc0bb9b5e9b7ff5b855e5a067275af7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e499a90eb0f2b0cd1791a21210127bc77ede459d9c9f7ee627722495e6aa0c7c",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-11-05T16:00:23Z",
    "title_canon_sha256": "f6a63be83dc9ee95da43ab094f644499dfcb909a3440dc87466a888e8072e1bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.01797",
    "kind": "arxiv",
    "version": 1
  }
}