Pith Number

pith:QC7CJXVY

pith:2009:QC7CJXVYGKGJA66NZNEGBQ4B6O

not attested not anchored not stored refs pending

Momentum flow in black-hole binaries: II. Numerical simulations of equal-mass, head-on mergers with antiparallel spins

David A. Nichols, Drew Keppel, Geoffrey Lovelace, Jeffrey D. Kaplan, Keith D. Matthews, Mark A. Scheel, Michael Cohen, Ulrich Sperhake, Yanbei Chen

arxiv:0907.0869 v1 · 2009-07-05 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QC7CJXVYGKGJA66NZNEGBQ4B6O}

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	2026-05-18T04:38:48.639631Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80be24deb8328c907bcdcb4860c381f3a504ab41438297faae0cd6666f26a9ae

Aliases

arxiv: 0907.0869 · arxiv_version: 0907.0869v1 · doi: 10.48550/arxiv.0907.0869 · pith_short_12: QC7CJXVYGKGJ · pith_short_16: QC7CJXVYGKGJA66N · pith_short_8: QC7CJXVY

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/QC7CJXVYGKGJA66NZNEGBQ4B6O \
  | 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: 80be24deb8328c907bcdcb4860c381f3a504ab41438297faae0cd6666f26a9ae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae450adf2fef70da2a1c7a1685bd58e7b0537d82efc69f3556b9363a12926b51",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-07-05T15:40:40Z",
    "title_canon_sha256": "6631236775c39ffeaded5cc763d1930aa7a10de16571d389e01d871bc67d76aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.0869",
    "kind": "arxiv",
    "version": 1
  }
}