Pith Number

pith:FMADCZRD

pith:2019:FMADCZRDHNMBE3QHKRM2SGGYFZ

not attested not anchored not stored refs pending

Constraints on the binary black hole hypothesis for system LB-1

(2) U of Toronto, (3) Caltech, (4) NAOC), A. W. Howard (3), C. D. Matzner (2), R.-F. Shen (1), W. Zhang (4) ((1) SYSU

arxiv:1911.12581 v1 · 2019-11-28 · astro-ph.SR · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FMADCZRDHNMBE3QHKRM2SGGYFZ}

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	2026-07-05T00:22:46.866850Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b003166233b58126e075459a918d82e6215b27d50710435b7b49c2ab4303711

Aliases

arxiv: 1911.12581 · arxiv_version: 1911.12581v1 · doi: 10.48550/arxiv.1911.12581 · pith_short_12: FMADCZRDHNMB · pith_short_16: FMADCZRDHNMBE3QH · pith_short_8: FMADCZRD

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/FMADCZRDHNMBE3QHKRM2SGGYFZ \
  | 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: 2b003166233b58126e075459a918d82e6215b27d50710435b7b49c2ab4303711

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "021a5574290048d861428c720e111e584c3dbeef12ae819a0bf9ac5a406955dc",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-11-28T08:15:32Z",
    "title_canon_sha256": "855b655a53120f5a7f3f798b0c6812d62a5e8739afeb71ff3ee81806a9b6f305"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.12581",
    "kind": "arxiv",
    "version": 1
  }
}