Pith Number

pith:DF4XNM4Q

pith:2015:DF4XNM4QAMU3CCFQP7DFQYFMGH

not attested not anchored not stored refs pending

Star formation scales and efficiency in Galactic spiral arms

A.J. Rigby, D. Elia, D.J. Eden, J.S. Urquhart, M.A. Thompson, R. Plume, T. J. T. Moore

arxiv:1506.04552 v1 · 2015-06-15 · astro-ph.GA

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

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	2026-05-18T01:36:52.823613Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

197976b3900329b108b07fc65860ac31f167a31ccd13c45f40c756841ecd0f37

Aliases

arxiv: 1506.04552 · arxiv_version: 1506.04552v1 · doi: 10.48550/arxiv.1506.04552 · pith_short_12: DF4XNM4QAMU3 · pith_short_16: DF4XNM4QAMU3CCFQ · pith_short_8: DF4XNM4Q

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/DF4XNM4QAMU3CCFQP7DFQYFMGH \
  | 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: 197976b3900329b108b07fc65860ac31f167a31ccd13c45f40c756841ecd0f37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "633cf9e34732f0f0528611b0afa2927482bfa54e0479e162bc48d5614eff0c55",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-06-15T11:17:38Z",
    "title_canon_sha256": "1d84b6b6a4553c7abd6fc38ac62c5174ff39f0bcdbcf914f470d659d981da92e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.04552",
    "kind": "arxiv",
    "version": 1
  }
}