Pith Number

pith:PIGVFBT2

pith:2013:PIGVFBT2H6UVEEKJOU2YSW54ZX

not attested not anchored not stored refs pending

Universal Doomsday: Analyzing Our Prospects for Survival

Alexander Vilenkin, Austin Gerig, Ken D. Olum

arxiv:1303.4676 v1 · 2013-03-19 · astro-ph.CO · hep-th · physics.hist-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PIGVFBT2H6UVEEKJOU2YSW54ZX}

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	2026-05-18T01:51:00.686484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a0d52867a3fa95211497535895bbccde9b63fc9bc4b3995a1c83578cdd73a65

Aliases

arxiv: 1303.4676 · arxiv_version: 1303.4676v1 · doi: 10.48550/arxiv.1303.4676 · pith_short_12: PIGVFBT2H6UV · pith_short_16: PIGVFBT2H6UVEEKJ · pith_short_8: PIGVFBT2

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/PIGVFBT2H6UVEEKJOU2YSW54ZX \
  | 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: 7a0d52867a3fa95211497535895bbccde9b63fc9bc4b3995a1c83578cdd73a65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ddbc23b474c55068b4cd5b558edede27a09ff99d711b416d965642215a5f5d0e",
    "cross_cats_sorted": [
      "hep-th",
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-03-19T17:50:07Z",
    "title_canon_sha256": "c9b237dffaa7449add3d38c3aeb30044d56c09a3b42d5e37b3b2ecd76f95b34d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.4676",
    "kind": "arxiv",
    "version": 1
  }
}