Pith Number

pith:ZVMKZYOZ

pith:2009:ZVMKZYOZG4UMFDW5IMYXMRS556

not attested not anchored not stored refs pending

On Nori's Obstruction to Universal Bundles

Ajneet Dhillon, Emre Coskun, Nicole Lemire

arxiv:0908.0313 v2 · 2009-08-03 · 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{ZVMKZYOZG4UMFDW5IMYXMRS556}

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	2026-05-18T04:40:46.485233Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd58ace1d93728c28edd433176465def9a9f5a6ec1b4a69c357cf4bed751fb1c

Aliases

arxiv: 0908.0313 · arxiv_version: 0908.0313v2 · doi: 10.48550/arxiv.0908.0313 · pith_short_12: ZVMKZYOZG4UM · pith_short_16: ZVMKZYOZG4UMFDW5 · pith_short_8: ZVMKZYOZ

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/ZVMKZYOZG4UMFDW5IMYXMRS556 \
  | 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: cd58ace1d93728c28edd433176465def9a9f5a6ec1b4a69c357cf4bed751fb1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4420f1c2e52f59ea80bcf39324ba4cb1d7a9693868aec82f3c2a96af18ebf7f9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-08-03T18:43:08Z",
    "title_canon_sha256": "6a4f85a80f6fed4e468e1d94653ba5b3598c0a2c85d9f303d8cc28ff71a69418"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.0313",
    "kind": "arxiv",
    "version": 2
  }
}