Pith Number

pith:RRQ26GB4

pith:2008:RRQ26GB4L2LBSWFK6KGCWZJAFP

not attested not anchored not stored refs pending

Emile Borel's difficult days in 1941

Glenn Shafer, Laurent Mazliak (PMA)

arxiv:0811.1321 v3 · 2008-11-09 · 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{RRQ26GB4L2LBSWFK6KGCWZJAFP}

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	2026-05-18T04:41:25.371957Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c61af183c5e961958aaf28c2b65202bd61da0e69c22635150d9ff102d3eb8b8

Aliases

arxiv: 0811.1321 · arxiv_version: 0811.1321v3 · doi: 10.48550/arxiv.0811.1321 · pith_short_12: RRQ26GB4L2LB · pith_short_16: RRQ26GB4L2LBSWFK · pith_short_8: RRQ26GB4

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/RRQ26GB4L2LBSWFK6KGCWZJAFP \
  | 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: 8c61af183c5e961958aaf28c2b65202bd61da0e69c22635150d9ff102d3eb8b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e267c34431b69940cbf6a1d96267aa943004d21838db9f7616369f82a61b868",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2008-11-09T07:20:19Z",
    "title_canon_sha256": "d3507da8478fbf8e9c818463ace89efa44b1bd2a622fad020313a80d298b24a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0811.1321",
    "kind": "arxiv",
    "version": 3
  }
}