Pith Number

pith:UDYPHDDH

pith:2011:UDYPHDDHK7WBQ6OMETPRLERKI6

not attested not anchored not stored refs pending

On quadratic orthogonal bisectional curvature

Albert Chau, Luen-fai Tam

arxiv:1108.6252 v1 · 2011-08-31 · 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{UDYPHDDHK7WBQ6OMETPRLERKI6}

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	2026-05-18T04:14:26.677412Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0f0f38c6757ec1879cc24df15922a4785b24822a299042bd7868b9ef00f8196

Aliases

arxiv: 1108.6252 · arxiv_version: 1108.6252v1 · doi: 10.48550/arxiv.1108.6252 · pith_short_12: UDYPHDDHK7WB · pith_short_16: UDYPHDDHK7WBQ6OM · pith_short_8: UDYPHDDH

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/UDYPHDDHK7WBQ6OMETPRLERKI6 \
  | 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: a0f0f38c6757ec1879cc24df15922a4785b24822a299042bd7868b9ef00f8196

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4160c92866101900995e653457cfb042ec641683b013947d31f58468ce33cb65",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2011-08-31T14:58:30Z",
    "title_canon_sha256": "decb756d2bec29b7c9c0be87bcbf6a6cae106324221aef0a66392f1ab3c66549"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.6252",
    "kind": "arxiv",
    "version": 1
  }
}