Pith Number

pith:43SAX5VH

pith:2010:43SAX5VHQ3RAJ7JKGG4WPXRCGU

not attested not anchored not stored refs pending

The Search for signals of technological activities in the galaxy

Guillermo A. Lemarchand

arxiv:1012.2587 v1 · 2010-12-12 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{43SAX5VHQ3RAJ7JKGG4WPXRCGU}

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	2026-05-18T04:33:28.268811Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6e40bf6a786e204fd2a31b967de223534e0726a11f1e15879476991026472de

Aliases

arxiv: 1012.2587 · arxiv_version: 1012.2587v1 · doi: 10.48550/arxiv.1012.2587 · pith_short_12: 43SAX5VHQ3RA · pith_short_16: 43SAX5VHQ3RAJ7JK · pith_short_8: 43SAX5VH

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/43SAX5VHQ3RAJ7JKGG4WPXRCGU \
  | 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: e6e40bf6a786e204fd2a31b967de223534e0726a11f1e15879476991026472de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d187fdf478c99acc6fef33799d70624ae001a6bf79c0e25123e4890eb77b5024",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2010-12-12T20:52:03Z",
    "title_canon_sha256": "2100c98fcbd523475c8d5cffa3d0b129d939d3f1812c19556ee941f452697d72"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.2587",
    "kind": "arxiv",
    "version": 1
  }
}