Pith Number

pith:ERYGKT2I

pith:2009:ERYGKT2I2DFVLAWAP7JSS4Y7CW

not attested not anchored not stored refs pending

SPH Simulations of Negative (Nodal) Superhumps: A Parametric Study

David M. Thomas, James C. Simpson, Matt A. Wood

arxiv:0906.2713 v1 · 2009-06-15 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ERYGKT2I2DFVLAWAP7JSS4Y7CW}

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	2026-05-18T02:13:20.063385Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2470654f48d0cb5582c07fd329731f159d18deedf7aa3b0a6632c0f9025b9a66

Aliases

arxiv: 0906.2713 · arxiv_version: 0906.2713v1 · doi: 10.48550/arxiv.0906.2713 · pith_short_12: ERYGKT2I2DFV · pith_short_16: ERYGKT2I2DFVLAWA · pith_short_8: ERYGKT2I

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/ERYGKT2I2DFVLAWAP7JSS4Y7CW \
  | 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: 2470654f48d0cb5582c07fd329731f159d18deedf7aa3b0a6632c0f9025b9a66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f27e006b919c0abe52a938c185a308815a644389e67f493b7fc63a54b997838c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-06-15T15:12:45Z",
    "title_canon_sha256": "82fa8613119b31e0ada019865678d06c4a4626bd1f971defcaabb45b8734bed9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.2713",
    "kind": "arxiv",
    "version": 1
  }
}