Pith Number

pith:LR7B2DWT

pith:1998:LR7B2DWTTCKURAAAYRQP65LF5W

not attested not anchored not stored refs pending

Spiral Structure in IP Peg: Confronting Theory and Observations

(2) University of Wales, Cardiff), Henri M.J. Boffin (2) ((1) Kobe University, Hiroshi Yukawa (1), Makoto Makita (1), Takuya Matsuda (1)

arxiv:astro-ph/9807239 v2 · 1998-07-23 · 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{LR7B2DWTTCKURAAAYRQP65LF5W}

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	2026-05-18T01:21:56.437585Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c7e1d0ed39895488000c460ff7565edb80ab8b6481b25ae0166ca33b4add8f3

Aliases

arxiv: astro-ph/9807239 · arxiv_version: astro-ph/9807239v2 · doi: 10.48550/arxiv.astro-ph/9807239 · pith_short_12: LR7B2DWTTCKU · pith_short_16: LR7B2DWTTCKURAAA · pith_short_8: LR7B2DWT

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/LR7B2DWTTCKURAAAYRQP65LF5W \
  | 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: 5c7e1d0ed39895488000c460ff7565edb80ab8b6481b25ae0166ca33b4add8f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c5e85e196fcc5a49093518a309ac11b9fc095c78d6d9e86f5a6e549327148cf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-07-23T11:38:20Z",
    "title_canon_sha256": "618e23ab809242f8228f253b81459597e0ba8820c95bd033720c22e5c96bcec1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9807239",
    "kind": "arxiv",
    "version": 2
  }
}