Pith Number

pith:XPQONKBE

pith:2025:XPQONKBEWAIZELGJNYKXACZCAT

not attested not anchored not stored refs pending

Human Extinction A Demographic Perspective

David A. Swanson, Jeff Tayman

arxiv:2508.07568 v1 · 2025-08-11 · q-bio.PE · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XPQONKBEWAIZELGJNYKXACZCAT}

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	2026-07-05T11:51:48.484742Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bbe0e6a824b011922cc96e15700b2204e9dce6bc6aaf89580080e9d63bdf95b3

Aliases

arxiv: 2508.07568 · arxiv_version: 2508.07568v1 · doi: 10.48550/arxiv.2508.07568 · pith_short_12: XPQONKBEWAIZ · pith_short_16: XPQONKBEWAIZELGJ · pith_short_8: XPQONKBE

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/XPQONKBEWAIZELGJNYKXACZCAT \
  | 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: bbe0e6a824b011922cc96e15700b2204e9dce6bc6aaf89580080e9d63bdf95b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8689a2a9a018d53b04a0c5ea466063aefce8f4ce2ccf0e142fd3c3e2067718d6",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2025-08-11T02:58:22Z",
    "title_canon_sha256": "3f67f4d0d9303136035c0fccb6879d41a0d4049c8120abfdeffbba26b9926b2b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.07568",
    "kind": "arxiv",
    "version": 1
  }
}