Pith Number

pith:B35UJPQR

pith:2017:B35UJPQRM3F6PYPK5EG64UDU63

not attested not anchored not stored refs pending

Constraint on the black-hole spin of M87 from the accretion-jet model

Jianchao Feng, Qingwen Wu

arxiv:1705.07804 v1 · 2017-05-22 · 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{B35UJPQRM3F6PYPK5EG64UDU63}

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	2026-05-18T00:39:34.886580Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0efb44be1166cbe7e1eae90dee5074f6c00577578eb9971723af0d63510aa720

Aliases

arxiv: 1705.07804 · arxiv_version: 1705.07804v1 · doi: 10.48550/arxiv.1705.07804 · pith_short_12: B35UJPQRM3F6 · pith_short_16: B35UJPQRM3F6PYPK · pith_short_8: B35UJPQR

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/B35UJPQRM3F6PYPK5EG64UDU63 \
  | 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: 0efb44be1166cbe7e1eae90dee5074f6c00577578eb9971723af0d63510aa720

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2035bba6c6e135a8e540bf6f234cb6a8ddd4ebe94b5fe276f9421bf453d1c611",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2017-05-22T15:20:58Z",
    "title_canon_sha256": "94af2d8f9e9ca056ff834e9b2a709cce667c88b106de703d8ccb4b27d947dacc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.07804",
    "kind": "arxiv",
    "version": 1
  }
}