Pith Number

pith:3ZRN5JOP

pith:2021:3ZRN5JOP7PQ7VIWNR7QALIQWKH

not attested not anchored not stored refs pending

A new determination of the primordial helium abundance using the analyses of HII region spectra from SDSS

A.V. Ivanchik, O.A. Kurichin, P.A. Kislitsyn, S.A. Balashev, V.V. Klimenko

arxiv:2101.09127 v2 · 2021-01-22 · 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{3ZRN5JOP7PQ7VIWNR7QALIQWKH}

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

Nucleosynthesis and CMB bounds on photophilic ALPs: a fresh look

Receipt and verification

First computed	2026-07-05T02:16:17.389347Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

de62dea5cffbe1faa2cd8fe005a21651ff8557797e8334ff055d5faea6bdbea6

Aliases

arxiv: 2101.09127 · arxiv_version: 2101.09127v2 · doi: 10.48550/arxiv.2101.09127 · pith_short_12: 3ZRN5JOP7PQ7 · pith_short_16: 3ZRN5JOP7PQ7VIWN · pith_short_8: 3ZRN5JOP

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/3ZRN5JOP7PQ7VIWNR7QALIQWKH \
  | 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: de62dea5cffbe1faa2cd8fe005a21651ff8557797e8334ff055d5faea6bdbea6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d0fc3c7ae5d7b19c96fbc88d988ac95c418a230074f4da84b414e16fae1f37c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2021-01-22T14:33:42Z",
    "title_canon_sha256": "6cc53009c26f4b776e2c98d2e9b51ec41f9236c1241e8626d98d518cc0f87167"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.09127",
    "kind": "arxiv",
    "version": 2
  }
}