Pith Number

pith:QESDZYXW

pith:2001:QESDZYXWO3WXQL6I7ZZML2OWB5

not attested not anchored not stored refs pending

No Need for Dark Matter in Galaxies?

N.W. Evans (Oxford)

arxiv:astro-ph/0102082 v1 · 2001-02-06 · astro-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{QESDZYXWO3WXQL6I7ZZML2OWB5}

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	2026-05-18T01:00:25.048740Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81243ce2f676ed782fc8fe72c5e9d60f68357bf2ffaa165659a1dcc169e9106f

Aliases

arxiv: astro-ph/0102082 · arxiv_version: astro-ph/0102082v1 · doi: 10.48550/arxiv.astro-ph/0102082 · pith_short_12: QESDZYXWO3WX · pith_short_16: QESDZYXWO3WXQL6I · pith_short_8: QESDZYXW

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/QESDZYXWO3WXQL6I7ZZML2OWB5 \
  | 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: 81243ce2f676ed782fc8fe72c5e9d60f68357bf2ffaa165659a1dcc169e9106f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1584bb1e270f10b28f28ee5ce85c6c16167f9bdc7433a8eb93ceecb7fa6fd07c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-02-06T00:24:51Z",
    "title_canon_sha256": "44db37fc326f0c882bb76357370c7102ac88e34511e59662ee9f1fe9697fff1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0102082",
    "kind": "arxiv",
    "version": 1
  }
}