Pith Number

pith:EJI33DMH

pith:2009:EJI33DMHJCJOW24EZG5ADTEJWM

not attested not anchored not stored refs pending

Reflexive representability and stable metrics

Alexander Berenstein (ICJ), Ita\"i Ben Yaacov (ICJ), Stefano Ferri

arxiv:0901.1003 v2 · 2009-01-08 · 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{EJI33DMHJCJOW24EZG5ADTEJWM}

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	2026-05-18T02:59:06.966667Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2251bd8d874892eb6b84c9ba01cc89b3217163ed037d1f4a3ce82e523aff2216

Aliases

arxiv: 0901.1003 · arxiv_version: 0901.1003v2 · doi: 10.48550/arxiv.0901.1003 · pith_short_12: EJI33DMHJCJO · pith_short_16: EJI33DMHJCJOW24E · pith_short_8: EJI33DMH

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/EJI33DMHJCJOW24EZG5ADTEJWM \
  | 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: 2251bd8d874892eb6b84c9ba01cc89b3217163ed037d1f4a3ce82e523aff2216

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82270561cccdb4b19d328db66dee428ba1d1716e2dcbd90a99557b3249e649d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2009-01-08T15:15:53Z",
    "title_canon_sha256": "7fe1e8064fd6d7cf5afee318a9f52671dfc34d8152c6d34ce4f4e1e031e051cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.1003",
    "kind": "arxiv",
    "version": 2
  }
}