Pith Number

pith:QWE5JO2H

pith:2015:QWE5JO2H3OX665EDFF2MNPUMYL

not attested not anchored not stored refs pending

Hereditarily rigid relations

Karsten Sch\"olzel, Lucien Haddad, Maurice Pouzet, Miguel Couceiro

arxiv:1505.02691 v1 · 2015-05-11 · math.CO · 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{QWE5JO2H3OX665EDFF2MNPUMYL}

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	2026-05-18T02:16:11.853134Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8589d4bb47dbafef74832974c6be8cc2c79884b579a10d2cfe580391eb402c8b

Aliases

arxiv: 1505.02691 · arxiv_version: 1505.02691v1 · doi: 10.48550/arxiv.1505.02691 · pith_short_12: QWE5JO2H3OX6 · pith_short_16: QWE5JO2H3OX665ED · pith_short_8: QWE5JO2H

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/QWE5JO2H3OX665EDFF2MNPUMYL \
  | 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: 8589d4bb47dbafef74832974c6be8cc2c79884b579a10d2cfe580391eb402c8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c74fb55021dba23115c04c61ad46f56784dcaf9c951a488f038823c55eb136cc",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-05-11T16:20:58Z",
    "title_canon_sha256": "bfefd89e76238b80a93a856fc7f000caef8127619642041f71ed0c06ea2ea9d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.02691",
    "kind": "arxiv",
    "version": 1
  }
}