Pith Number

pith:NK4HDRSY

pith:2010:NK4HDRSYBZGHWILMVMKTLNJFTZ

not attested not anchored not stored refs pending

On the topology of H(2)

Duc-Manh Nguyen

arxiv:1003.0864 v2 · 2010-03-03 · math.GT · 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{NK4HDRSYBZGHWILMVMKTLNJFTZ}

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	2026-05-18T04:00:38.207372Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ab871c6580e4c7b216cab1535b5259e705d82beccf913e4c0684e91369812b9

Aliases

arxiv: 1003.0864 · arxiv_version: 1003.0864v2 · doi: 10.48550/arxiv.1003.0864 · pith_short_12: NK4HDRSYBZGH · pith_short_16: NK4HDRSYBZGHWILM · pith_short_8: NK4HDRSY

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/NK4HDRSYBZGHWILMVMKTLNJFTZ \
  | 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: 6ab871c6580e4c7b216cab1535b5259e705d82beccf913e4c0684e91369812b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89e6670217f8a940c8776621a3c6d2127441b39f10c21b8464fe3c048983b3f3",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2010-03-03T17:46:47Z",
    "title_canon_sha256": "6f31a5ae9b49b2065a3588443a4e32a7b6b587397439c86ae421c66f7da3e684"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.0864",
    "kind": "arxiv",
    "version": 2
  }
}