Pith Number

pith:44QDF4Y7

pith:2015:44QDF4Y7BCP6TCP7J5WANICFVH

not attested not anchored not stored refs pending

Nuclear War from a Cosmic Perspective

Max Tegmark (MIT)

arxiv:1505.00246 v2 · 2015-05-01 · physics.soc-ph · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{44QDF4Y7BCP6TCP7J5WANICFVH}

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	2026-05-18T02:03:54.591356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e72032f31f089fe989ff4f6c06a045a9cb6baa42f050058d11c00227cecf5089

Aliases

arxiv: 1505.00246 · arxiv_version: 1505.00246v2 · doi: 10.48550/arxiv.1505.00246 · pith_short_12: 44QDF4Y7BCP6 · pith_short_16: 44QDF4Y7BCP6TCP7 · pith_short_8: 44QDF4Y7

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/44QDF4Y7BCP6TCP7J5WANICFVH \
  | 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: e72032f31f089fe989ff4f6c06a045a9cb6baa42f050058d11c00227cecf5089

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c02d6cf9138ea85d70da7be310829ca9aac15616aa7abec461856272b27341f",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2015-05-01T18:59:30Z",
    "title_canon_sha256": "6d01344780b370827ad0b9d6e3b46cc90053bc1980d58af30d45dbb7b4a73192"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.00246",
    "kind": "arxiv",
    "version": 2
  }
}