Pith Number

pith:T7FEFA7S

pith:2013:T7FEFA7SFOJUSPWONVWUWOAIKY

not attested not anchored not stored refs pending

The spiral structure of our Milky Way

J. L. Han, L. G. Hou

arxiv:1304.8001 v1 · 2013-03-28 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T7FEFA7SFOJUSPWONVWUWOAIKY}

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	2026-05-18T03:26:51.206558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fca4283f22b93493ece6d6d4b38085625c009e6849f16cfa0220efc4b3127f3

Aliases

arxiv: 1304.8001 · arxiv_version: 1304.8001v1 · doi: 10.48550/arxiv.1304.8001 · pith_short_12: T7FEFA7SFOJU · pith_short_16: T7FEFA7SFOJUSPWO · pith_short_8: T7FEFA7S

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/T7FEFA7SFOJUSPWONVWUWOAIKY \
  | 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: 9fca4283f22b93493ece6d6d4b38085625c009e6849f16cfa0220efc4b3127f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa6c9bc397d3ecb5a5b2ebf6c0787cf027186ab21ec9d1c57097fc8ef32b1b90",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-03-28T02:06:01Z",
    "title_canon_sha256": "8653ec60292d1cec061cfb3afac81cc4f48ad8f0afef7a444836a875ae6829d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.8001",
    "kind": "arxiv",
    "version": 1
  }
}