Pith Number

pith:DAOHHTAH

pith:2018:DAOHHTAHGXFU7DDWFCQNXJNWVL

not attested not anchored not stored refs pending

Life Before Fermi - Back to the Solar System

David L Clements

arxiv:1811.06313 v1 · 2018-11-15 · 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{DAOHHTAHGXFU7DDWFCQNXJNWVL}

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	2026-05-18T00:00:38.059603Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

181c73cc0735cb4f8c7628a0dba5b6aad523414381cab8a12b7c3b6f3a60fd10

Aliases

arxiv: 1811.06313 · arxiv_version: 1811.06313v1 · doi: 10.48550/arxiv.1811.06313 · pith_short_12: DAOHHTAHGXFU · pith_short_16: DAOHHTAHGXFU7DDW · pith_short_8: DAOHHTAH

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/DAOHHTAHGXFU7DDWFCQNXJNWVL \
  | 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: 181c73cc0735cb4f8c7628a0dba5b6aad523414381cab8a12b7c3b6f3a60fd10

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b88f420659b797267fee242523eb4a4cdd2240018e0fb0b426bc6fb04f62f2c2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-11-15T12:27:44Z",
    "title_canon_sha256": "466484b3d268e7b811c7d8e3c253665b6af638a23cb3c691cab80e6e7fc48d6e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.06313",
    "kind": "arxiv",
    "version": 1
  }
}