Pith Number

pith:6YBH3ZMU

pith:2016:6YBH3ZMUFW5SWCK5WC7LVLESI4

not attested not anchored not stored refs pending

How to Measure Black Hole's Mass, Spin and Direction of Spin Axis in Kerr Lens Effect 1: test case with simple source emission near BH

Hiromi Saida

arxiv:1606.04716 v4 · 2016-06-15 · astro-ph.HE · 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{6YBH3ZMUFW5SWCK5WC7LVLESI4}

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	2026-05-18T00:44:24.646001Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6027de5942dbb2b095db0bebaac924710af8f7b17610e315f4226e71df904ab

Aliases

arxiv: 1606.04716 · arxiv_version: 1606.04716v4 · doi: 10.48550/arxiv.1606.04716 · pith_short_12: 6YBH3ZMUFW5S · pith_short_16: 6YBH3ZMUFW5SWCK5 · pith_short_8: 6YBH3ZMU

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/6YBH3ZMUFW5SWCK5WC7LVLESI4 \
  | 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: f6027de5942dbb2b095db0bebaac924710af8f7b17610e315f4226e71df904ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ee7aacf231da84fb3621e9382ca4e282473e7b6ccc708b9e4901ded45dbabfc",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2016-06-15T10:45:06Z",
    "title_canon_sha256": "dac3d027a8d342810b9a80de9637a0c3f921ec4950f80e398519947815533b05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.04716",
    "kind": "arxiv",
    "version": 4
  }
}