Pith Number

pith:Y6Z4Q7HF

pith:2015:Y6Z4Q7HFGUI6EL6RXKPSM4BSBJ

not attested not anchored not stored refs pending

On the maximal efficiency of the collisional Penrose process

Elly Leiderschneider, Tsvi Piran

arxiv:1510.06764 v2 · 2015-10-22 · gr-qc · astro-ph.HE · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y6Z4Q7HFGUI6EL6RXKPSM4BSBJ}

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	2026-05-18T01:19:47.925958Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7b3c87ce53511e22fd1ba9f2670320a57403b690d984f28f9d54a9caaa4cf34

Aliases

arxiv: 1510.06764 · arxiv_version: 1510.06764v2 · doi: 10.48550/arxiv.1510.06764 · pith_short_12: Y6Z4Q7HFGUI6 · pith_short_16: Y6Z4Q7HFGUI6EL6R · pith_short_8: Y6Z4Q7HF

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/Y6Z4Q7HFGUI6EL6RXKPSM4BSBJ \
  | 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: c7b3c87ce53511e22fd1ba9f2670320a57403b690d984f28f9d54a9caaa4cf34

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3cb2f78c91eeaa206056d13f8faed4dd74db3ea5be01cb49adfb127018ead2f5",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2015-10-22T20:40:37Z",
    "title_canon_sha256": "9e5b278608eb33dd1575cc419722362f3ff54048002bd337cda146c966fba01f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.06764",
    "kind": "arxiv",
    "version": 2
  }
}