Pith Number

pith:4H4ODQJY

pith:1995:4H4ODQJYJ2Y7QRZSKT2N44GEVR

not attested not anchored not stored refs pending

Coding Without Fine Structure

Sy D. Friedman

arxiv:math/9509208 v1 · 1995-09-01 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4H4ODQJYJ2Y7QRZSKT2N44GEVR}

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	2026-05-18T01:05:48.364608Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1f8e1c1384eb1f8473254f4de70c4ac5afc87bb03351eed4fd88e194869aad1

Aliases

arxiv: math/9509208 · arxiv_version: math/9509208v1 · doi: 10.48550/arxiv.math/9509208 · pith_short_12: 4H4ODQJYJ2Y7 · pith_short_16: 4H4ODQJYJ2Y7QRZS · pith_short_8: 4H4ODQJY

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/4H4ODQJYJ2Y7QRZSKT2N44GEVR \
  | 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: e1f8e1c1384eb1f8473254f4de70c4ac5afc87bb03351eed4fd88e194869aad1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ef8450b6ab68538ddcd9f77789d1d61164a18b1bbe7890b07a2e278bf99129b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.LO",
    "submitted_at": "1995-09-01T00:00:00Z",
    "title_canon_sha256": "240d599124792d376b458c5cf811d4dd790f0e485789463989f2ba37fb6d8bc8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9509208",
    "kind": "arxiv",
    "version": 1
  }
}