Pith Number

pith:R752QPTJ

pith:2005:R752QPTJX72SMOBSODWIJT2JJC

not attested not anchored not stored refs pending

Saunders Mac Lane, the Knight of Mathematics

S. S. Kutateladze

arxiv:math/0507203 v1 · 2005-07-11 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R752QPTJX72SMOBSODWIJT2JJC}

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	2026-05-18T04:21:00.902265Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8ffba83e69bff526383270ec84cf4948b6064c336073fe6965b9f9c9d68a2e65

Aliases

arxiv: math/0507203 · arxiv_version: math/0507203v1 · doi: 10.48550/arxiv.math/0507203 · pith_short_12: R752QPTJX72S · pith_short_16: R752QPTJX72SMOBS · pith_short_8: R752QPTJ

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/R752QPTJX72SMOBSODWIJT2JJC \
  | 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: 8ffba83e69bff526383270ec84cf4948b6064c336073fe6965b9f9c9d68a2e65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ddd7b7338fff05705f27011e672302a03b62fd64fd3614154ac6d8153ab8025",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.HO",
    "submitted_at": "2005-07-11T06:01:33Z",
    "title_canon_sha256": "fa2bad09b1c271c03da59abfba14e4809daf867a05aa6610bc9d9c2d62c90ecc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0507203",
    "kind": "arxiv",
    "version": 1
  }
}