Pith Number

pith:IWDZ3O5H

pith:1996:IWDZ3O5H5TALTFHNPUMNZ4AGJO

not attested not anchored not stored refs pending

A Variation of the Present Star Formation Activity of Spiral Galaxies

Akihiko Tomita, Mamoru Saito, Yoshio Tomita

arxiv:astro-ph/9601133 v1 · 1996-01-24 · 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{IWDZ3O5H5TALTFHNPUMNZ4AGJO}

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	2026-05-18T01:40:21.922781Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45879dbba7ecc0b994ed7d18dcf0064bb8b37d9775bbc699e227b994133a7b16

Aliases

arxiv: astro-ph/9601133 · arxiv_version: astro-ph/9601133v1 · doi: 10.48550/arxiv.astro-ph/9601133 · pith_short_12: IWDZ3O5H5TAL · pith_short_16: IWDZ3O5H5TALTFHN · pith_short_8: IWDZ3O5H

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/IWDZ3O5H5TALTFHNPUMNZ4AGJO \
  | 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: 45879dbba7ecc0b994ed7d18dcf0064bb8b37d9775bbc699e227b994133a7b16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b328cb0426cf564c734fc3d94c7635c8237290b0a998bc7a2bb45da849b99d41",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-01-24T12:03:42Z",
    "title_canon_sha256": "1c1475ddb16d3334ad3c708c9c327457a4441cdf18c7d0824636201fd555373d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9601133",
    "kind": "arxiv",
    "version": 1
  }
}