Pith Number

pith:BVAZ36QO

pith:2003:BVAZ36QOD53DVWE2W2VRIB2B2J

not attested not anchored not stored refs pending

Systematic effects and a new determination of the primordial abundance of 4He and dY/dZ from observations of blue compact galaxies

(2) University of Virginia, Charlottesville, Kyiv, T. X. Thuan (2) ((1) Main Astronomical Observatory, Ukraine, USA), Y. I. Izotov (1)

arxiv:astro-ph/0310421 v1 · 2003-10-15 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BVAZ36QOD53DVWE2W2VRIB2B2J}

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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

Fifty years of primordial helium abundances: A statistical reanalysis

Receipt and verification

First computed	2026-07-04T15:20:12.618484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d419dfa0e1f763ad89ab6ab140741d27bb0cc222082057e1cf48fb90ffd5d77

Aliases

arxiv: astro-ph/0310421 · arxiv_version: astro-ph/0310421v1 · doi: 10.48550/arxiv.astro-ph/0310421 · pith_short_12: BVAZ36QOD53D · pith_short_16: BVAZ36QOD53DVWE2 · pith_short_8: BVAZ36QO

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/BVAZ36QOD53DVWE2W2VRIB2B2J \
  | 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: 0d419dfa0e1f763ad89ab6ab140741d27bb0cc222082057e1cf48fb90ffd5d77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e11adfce365dca37a8b2361248d2fe14ae174e7577e639ef865fda025a1a3a88",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-10-15T15:57:16Z",
    "title_canon_sha256": "13ba10c36be505504fe5aa07b9e704811131820ad160de6c7a52398248e0d089"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0310421",
    "kind": "arxiv",
    "version": 1
  }
}