Pith Number

pith:BZ6IAEC4

pith:2018:BZ6IAEC42FLOEK4AFTRJ2VRECV

not attested not anchored not stored refs pending

A new counterexample to Nguyen's conjecture on surface fibration

Hao Xiao, Lingyu Zhuo, Wenyi Cai, Yuanyuan Qian

arxiv:1811.10421 v3 · 2018-11-26 · 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{BZ6IAEC42FLOEK4AFTRJ2VRECV}

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	2026-07-05T10:06:59.653554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e7c80105cd156e22b802ce29d5624154bbb5e2e615827b242231bcb5d1777b4

Aliases

arxiv: 1811.10421 · arxiv_version: 1811.10421v3 · doi: 10.48550/arxiv.1811.10421 · pith_short_12: BZ6IAEC42FLO · pith_short_16: BZ6IAEC42FLOEK4A · pith_short_8: BZ6IAEC4

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/BZ6IAEC42FLOEK4AFTRJ2VRECV \
  | 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: 0e7c80105cd156e22b802ce29d5624154bbb5e2e615827b242231bcb5d1777b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "731f07bf77d074ba96c90bcb95bcc589799dc5a96b283d9409955938a29a19f3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-11-26T14:52:59Z",
    "title_canon_sha256": "250bc4ef87b9606f85fa0bb4073a7c99eab4552c0539c543d510f3584a8de882"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.10421",
    "kind": "arxiv",
    "version": 3
  }
}