Pith Number

pith:55F3HYAH

pith:2008:55F3HYAHRSZLFFNGV3JJTQLIA2

not attested not anchored not stored refs pending

Distortions of the Helicoid

Christine Breiner, Jacob Bernstein

arxiv:0805.4775 v1 · 2008-05-30 · 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{55F3HYAHRSZLFFNGV3JJTQLIA2}

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	2026-05-18T01:13:38.536148Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef4bb3e0078cb2b295a6aed299c16806b4bdd8b795f454cddbb7c87063cec221

Aliases

arxiv: 0805.4775 · arxiv_version: 0805.4775v1 · doi: 10.48550/arxiv.0805.4775 · pith_short_12: 55F3HYAHRSZL · pith_short_16: 55F3HYAHRSZLFFNG · pith_short_8: 55F3HYAH

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/55F3HYAHRSZLFFNGV3JJTQLIA2 \
  | 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: ef4bb3e0078cb2b295a6aed299c16806b4bdd8b795f454cddbb7c87063cec221

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a9eb58620e8ba5c66c72e920d94c4237fe9db12bf5446b30f644e2089088337",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2008-05-30T14:35:34Z",
    "title_canon_sha256": "ed8554dc39369eb2209b9384c134cea80b92242c9b4b0fc60bf36c5269c6e12b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0805.4775",
    "kind": "arxiv",
    "version": 1
  }
}