Pith Number

pith:T2RONQ4Q

pith:2025:T2RONQ4QY2WM7AWM4XUXEP6WDG

not attested not anchored not stored refs pending

Ground to Dust: Collisional Cascades and the Fate of Kardashev II Megaswarms

Brian C. Lacki

arxiv:2504.21151 v2 · 2025-04-29 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T2RONQ4QY2WM7AWM4XUXEP6WDG}

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	2026-07-05T11:30:43.839533Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ea2e6c390c6accf82cce5e9723fd619b3ff13ea45bd80c51f402b5684cbc7b7

Aliases

arxiv: 2504.21151 · arxiv_version: 2504.21151v2 · doi: 10.48550/arxiv.2504.21151 · pith_short_12: T2RONQ4QY2WM · pith_short_16: T2RONQ4QY2WM7AWM · pith_short_8: T2RONQ4Q

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/T2RONQ4QY2WM7AWM4XUXEP6WDG \
  | 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: 9ea2e6c390c6accf82cce5e9723fd619b3ff13ea45bd80c51f402b5684cbc7b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43d807d91b2cb252eca7558506508267831feafd87a1c8fef478413e37afa507",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2025-04-29T20:11:26Z",
    "title_canon_sha256": "9fc77fd7204f211f3754934f5134349724035638ae7ada9cfe0a3d115a0a3a9f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.21151",
    "kind": "arxiv",
    "version": 2
  }
}