Pith Number

pith:E2BIFHQL

pith:2016:E2BIFHQLCSZPBYYQSPQWVNZA6P

not attested not anchored not stored refs pending

Non-crossing chords of a polygon with forbidden positions

Demin Zhang, Dongyi Wei, Dong Zhang

arxiv:1611.03166 v2 · 2016-11-10 · math.CO

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

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	2026-05-18T00:03:50.445658Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2682829e0b14b2f0e31093e16ab720f3dd2a652ff384549551d1f098165bb676

Aliases

arxiv: 1611.03166 · arxiv_version: 1611.03166v2 · doi: 10.48550/arxiv.1611.03166 · pith_short_12: E2BIFHQLCSZP · pith_short_16: E2BIFHQLCSZPBYYQ · pith_short_8: E2BIFHQL

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/E2BIFHQLCSZPBYYQSPQWVNZA6P \
  | 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: 2682829e0b14b2f0e31093e16ab720f3dd2a652ff384549551d1f098165bb676

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "426da320f626fae6610a6317e793c2bda5387ff3049d6ee870d035165947c90f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-11-10T02:37:22Z",
    "title_canon_sha256": "f958d97319dcc98292553c9e1ebf440056acc21ca67dc6dfa2f98e87106e595b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.03166",
    "kind": "arxiv",
    "version": 2
  }
}