Pith Number

pith:BDO2R2ED

pith:2016:BDO2R2EDFSTV7KYAKIXQGOKG63

not attested not anchored not stored refs pending

The Picard Rank of an Enriques Surface

Christian Liedtke

arxiv:1606.01771 v2 · 2016-06-06 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BDO2R2EDFSTV7KYAKIXQGOKG63}

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	2026-05-18T00:24:53.313879Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08dda8e8832ca75fab00522f033946f6dab6d762df7226cf2ad1d2fa48375c78

Aliases

arxiv: 1606.01771 · arxiv_version: 1606.01771v2 · doi: 10.48550/arxiv.1606.01771 · pith_short_12: BDO2R2EDFSTV · pith_short_16: BDO2R2EDFSTV7KYA · pith_short_8: BDO2R2ED

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/BDO2R2EDFSTV7KYAKIXQGOKG63 \
  | 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: 08dda8e8832ca75fab00522f033946f6dab6d762df7226cf2ad1d2fa48375c78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3cd84b9d4b08e9f9cf00130344db723db6c12669f520b1dedabed77c9e0b60e4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-06-06T14:49:52Z",
    "title_canon_sha256": "ccd9cc881d46c2ce3423a66dab84b6aab845280050cec1e7bfb6a62e535d49d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.01771",
    "kind": "arxiv",
    "version": 2
  }
}