Pith Number

pith:EGY5ETVD

pith:2012:EGY5ETVDAUK545LGXIPIXMSISX

not attested not anchored not stored refs pending

A classification theorem for Helfrich surfaces

Glen Wheeler, James McCoy

arxiv:1201.4540 v1 · 2012-01-22 · math.DG · math.AP

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	2026-05-18T03:25:06.121694Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21b1d24ea30515de7566ba1e8bb24895ea414c3c658c0766101b35b24ceec5fa

Aliases

arxiv: 1201.4540 · arxiv_version: 1201.4540v1 · doi: 10.48550/arxiv.1201.4540 · pith_short_12: EGY5ETVDAUK5 · pith_short_16: EGY5ETVDAUK545LG · pith_short_8: EGY5ETVD

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/EGY5ETVDAUK545LGXIPIXMSISX \
  | 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: 21b1d24ea30515de7566ba1e8bb24895ea414c3c658c0766101b35b24ceec5fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0190a1065e4e4cbd2dfff1fb98f08ab5fb5ddeea32ac0e538737f351a421bb4",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2012-01-22T09:03:56Z",
    "title_canon_sha256": "e45359bcceb38cb26c378763f9eae0db953714a379a11e4f0357dd26f67de683"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4540",
    "kind": "arxiv",
    "version": 1
  }
}