Pith Number

pith:PNDCT7RE

pith:2013:PNDCT7REGDAD4UGNAJIQ7N4ZQ5

not attested not anchored not stored refs pending

Two-phase model for Black Hole feeding and feedback

Sergei Nayakshin (Leicester)

arxiv:1311.4492 v1 · 2013-11-15 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PNDCT7REGDAD4UGNAJIQ7N4ZQ5}

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	2026-05-18T01:46:23.464008Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b4629fe2430c03e50cd02510fb799874ff8414e00008ea3a43b86e5b95f3ba9

Aliases

arxiv: 1311.4492 · arxiv_version: 1311.4492v1 · doi: 10.48550/arxiv.1311.4492 · pith_short_12: PNDCT7REGDAD · pith_short_16: PNDCT7REGDAD4UGN · pith_short_8: PNDCT7RE

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/PNDCT7REGDAD4UGNAJIQ7N4ZQ5 \
  | 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: 7b4629fe2430c03e50cd02510fb799874ff8414e00008ea3a43b86e5b95f3ba9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cfeca1a07363fcaaa08e36a581adedf4b83c4ad1896d16ed7943f15cce702e59",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-11-15T17:24:44Z",
    "title_canon_sha256": "f84986559e8a8791a615a6642cf267ecf15485cd573e7d75b40f9eb7daf17a37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.4492",
    "kind": "arxiv",
    "version": 1
  }
}