Pith Number

pith:6F4FEJ22

pith:2002:6F4FEJ22TEN5T4NCVPTF6GAP3I

not attested not anchored not stored refs pending

Retro-MACHOs: Pi in the sky?

Daniel E. Holz (ITP, John A. Wheeler (Princeton), UCSB)

arxiv:astro-ph/0209039 v1 · 2002-09-02 · astro-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6F4FEJ22TEN5T4NCVPTF6GAP3I}

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	2026-07-04T16:30:43.551577Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f17852275a991bd9f1a2abe65f180fda3dec2c1469053e4c83cedda014735a31

Aliases

arxiv: astro-ph/0209039 · arxiv_version: astro-ph/0209039v1 · doi: 10.48550/arxiv.astro-ph/0209039 · pith_short_12: 6F4FEJ22TEN5 · pith_short_16: 6F4FEJ22TEN5T4NC · pith_short_8: 6F4FEJ22

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/6F4FEJ22TEN5T4NCVPTF6GAP3I \
  | 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: f17852275a991bd9f1a2abe65f180fda3dec2c1469053e4c83cedda014735a31

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b481a96cb026b1b792d1a01aef99d8595cd97965082ca201eccb93a95ec739ed",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-09-02T21:44:35Z",
    "title_canon_sha256": "0bc2f546287b18e5d2a61b2ab933241dd4871bd226a35b29bfd76e135fd5a37f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0209039",
    "kind": "arxiv",
    "version": 1
  }
}