Pith Number

pith:DDJHGYZI

pith:2023:DDJHGYZIPPVL4IPU7MJ3WJD7WU

not attested not anchored not stored refs pending

Why does the Milky Way have a bar?

Bridget Ratcliffe, Ivan Minchev, Jakob C. Walcher, Matthias Steinmetz, Noam Libeskind, Sergey Khoperskov

arxiv:2309.07321 v2 · 2023-09-13 · 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{DDJHGYZIPPVL4IPU7MJ3WJD7WU}

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	2026-07-05T08:43:50.398076Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18d27363287beabe21f4fb13bb247fb52f581e8c04385d79b887599758f15f82

Aliases

arxiv: 2309.07321 · arxiv_version: 2309.07321v2 · doi: 10.48550/arxiv.2309.07321 · pith_short_12: DDJHGYZIPPVL · pith_short_16: DDJHGYZIPPVL4IPU · pith_short_8: DDJHGYZI

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/DDJHGYZIPPVL4IPU7MJ3WJD7WU \
  | 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: 18d27363287beabe21f4fb13bb247fb52f581e8c04385d79b887599758f15f82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc4ffb454633ea46528380814d6c67e4d41e1cd288a5a697c3150aa93db6f0a8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2023-09-13T21:21:00Z",
    "title_canon_sha256": "f69ef9c6adee606bf31d654e9b8565cd051085ceffe9db4a61187dd5ce9011e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2309.07321",
    "kind": "arxiv",
    "version": 2
  }
}