Pith Number

pith:HXNQCDGY

pith:2010:HXNQCDGYDX6UV3FSO7FN2JTTCW

not attested not anchored not stored refs pending

Contact geometry and the Poincar\'e conjecture

Jong Taek Cho

arxiv:1006.2511 v2 · 2010-06-13 · math.GM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HXNQCDGYDX6UV3FSO7FN2JTTCW}

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	2026-05-18T04:04:31.279475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ddb010cd81dfd4aecb277cadd267315837dfa3f80968e8b8cac89ebc403898b

Aliases

arxiv: 1006.2511 · arxiv_version: 1006.2511v2 · doi: 10.48550/arxiv.1006.2511 · pith_short_12: HXNQCDGYDX6U · pith_short_16: HXNQCDGYDX6UV3FS · pith_short_8: HXNQCDGY

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/HXNQCDGYDX6UV3FSO7FN2JTTCW \
  | 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: 3ddb010cd81dfd4aecb277cadd267315837dfa3f80968e8b8cac89ebc403898b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "711c9343622e1b7e8f32f6e2aec35b4062c8d8405e1fa52b68f5543eb4507d29",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GM",
    "submitted_at": "2010-06-13T04:43:52Z",
    "title_canon_sha256": "6d0047282b6a4b3f9fd547dc131a5e373b3eea374ef71aac34507e59f8d0c082"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1006.2511",
    "kind": "arxiv",
    "version": 2
  }
}