Pith Number

pith:2ESEEE6Z

pith:2013:2ESEEE6ZRBQUZLWO5MFAQOJGS6

not attested not anchored not stored refs pending

Introduction to the Ekedahl Invariants

Ivan Martino

arxiv:1312.6496 v3 · 2013-12-23 · math.AG · math.GR · math.KT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2ESEEE6ZRBQUZLWO5MFAQOJGS6}

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	2026-05-18T02:34:52.560098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1244213d988614caeceeb0a08392697b953bfbf3f8d08209d48d7d9757f6f02

Aliases

arxiv: 1312.6496 · arxiv_version: 1312.6496v3 · doi: 10.48550/arxiv.1312.6496 · pith_short_12: 2ESEEE6ZRBQU · pith_short_16: 2ESEEE6ZRBQUZLWO · pith_short_8: 2ESEEE6Z

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/2ESEEE6ZRBQUZLWO5MFAQOJGS6 \
  | 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: d1244213d988614caeceeb0a08392697b953bfbf3f8d08209d48d7d9757f6f02

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "edb20e4b0dd50411806207521c85e16a9f263038521bcfe883bf7f3ab7686216",
    "cross_cats_sorted": [
      "math.GR",
      "math.KT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-12-23T09:41:11Z",
    "title_canon_sha256": "aa84278a3df764b10b404cd62bfff1da28c3fcf1c05d55c3152d06b83fdaf8f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.6496",
    "kind": "arxiv",
    "version": 3
  }
}