Pith Number

pith:OPRKIFYV

pith:2014:OPRKIFYVZYNZYK4QN7E5Q6CPIG

not attested not anchored not stored refs pending

A counterexample to Belgun-Moroianu conjecture

Vladimir S. Matveev, Yuri Nikolayevsky

arxiv:1412.1931 v1 · 2014-12-05 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OPRKIFYVZYNZYK4QN7E5Q6CPIG}

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	2026-05-18T01:31:19.857158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73e2a41715ce1b9c2b906fc9d8784f419b5a53088ef46321b9bf61a53adb8903

Aliases

arxiv: 1412.1931 · arxiv_version: 1412.1931v1 · doi: 10.48550/arxiv.1412.1931 · pith_short_12: OPRKIFYVZYNZ · pith_short_16: OPRKIFYVZYNZYK4Q · pith_short_8: OPRKIFYV

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/OPRKIFYVZYNZYK4QN7E5Q6CPIG \
  | 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: 73e2a41715ce1b9c2b906fc9d8784f419b5a53088ef46321b9bf61a53adb8903

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b27a7c2b54f9ced3d0359590eb640b432022a597394e52080247597f1c057704",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2014-12-05T09:26:09Z",
    "title_canon_sha256": "f4357b7911f05c0115e736bdb93b10f7af05349d74fa8939a979fbcbf98fd450"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.1931",
    "kind": "arxiv",
    "version": 1
  }
}