Pith Number

pith:DU5Z42M5

pith:2017:DU5Z42M5632I5BDFHJY55RNXSB

not attested not anchored not stored refs pending

Constraints on Spin of a Supermassive Black Hole in Quasars with Big Blue Bump

M.Yu. Piotrovich, S.D. Buliga, T.M. Natsvlishvili, Yu.N. Gnedin

arxiv:1711.07272 v1 · 2017-11-20 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DU5Z42M5632I5BDFHJY55RNXSB}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:27:41.600984Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d3b9e699df6f48e84653a71dec5b7904af96dde88de4647114962a467f04fb6

Aliases

arxiv: 1711.07272 · arxiv_version: 1711.07272v1 · doi: 10.48550/arxiv.1711.07272 · pith_short_12: DU5Z42M5632I · pith_short_16: DU5Z42M5632I5BDF · pith_short_8: DU5Z42M5

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/DU5Z42M5632I5BDFHJY55RNXSB \
  | 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: 1d3b9e699df6f48e84653a71dec5b7904af96dde88de4647114962a467f04fb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "875aa3ca15c9a146d5cb4415d67e2b123f508b830d09f5d682e425e26010ae36",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-11-20T12:05:03Z",
    "title_canon_sha256": "235bd160ffef2333e143147745a17ea3e2b8a8c177949f1b5d50588b553f8dc3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.07272",
    "kind": "arxiv",
    "version": 1
  }
}