Pith Number

pith:H6L74XQY

pith:1995:H6L74XQYTB6FRLDQKEQCFKDEOZ

not attested not anchored not stored refs pending

Interstellar Grains in Elliptical Galaxies: Grain Evolution

CITA), John C. Tsai (NASA Ames, Santa Cruz), William G. Mathews (University of California

arxiv:astro-ph/9502053 v1 · 1995-02-09 · 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{H6L74XQYTB6FRLDQKEQCFKDEOZ}

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	2026-05-18T01:07:42.287260Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f97fe5e18987c58ac70512022a86476607e047a802cf643aad978de61802698

Aliases

arxiv: astro-ph/9502053 · arxiv_version: astro-ph/9502053v1 · doi: 10.48550/arxiv.astro-ph/9502053 · pith_short_12: H6L74XQYTB6F · pith_short_16: H6L74XQYTB6FRLDQ · pith_short_8: H6L74XQY

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/H6L74XQYTB6FRLDQKEQCFKDEOZ \
  | 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: 3f97fe5e18987c58ac70512022a86476607e047a802cf643aad978de61802698

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9be737926d4469b3d996264295905e2fea8a5fee589f1d1b1a8bc866c8d131cf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-02-09T16:58:33Z",
    "title_canon_sha256": "578d8415ca72c2749d62e8dc0cd6a178e34d650a6348b58d70883c972b486066"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9502053",
    "kind": "arxiv",
    "version": 1
  }
}