Pith Number

pith:HEMHSF3R

pith:2008:HEMHSF3RMFCU35BORXE2JYEWAB

not attested not anchored not stored refs pending

On the unfolding of simple closed curves

John Pardon

arxiv:0809.1404 v1 · 2008-09-08 · 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{HEMHSF3RMFCU35BORXE2JYEWAB}

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	2026-05-18T04:08:04.258337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

391879177161454df42e8dc9a4e09600542958418a9e0d9380ca8c6d92f1cbf8

Aliases

arxiv: 0809.1404 · arxiv_version: 0809.1404v1 · doi: 10.48550/arxiv.0809.1404 · pith_short_12: HEMHSF3RMFCU · pith_short_16: HEMHSF3RMFCU35BO · pith_short_8: HEMHSF3R

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/HEMHSF3RMFCU35BORXE2JYEWAB \
  | 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: 391879177161454df42e8dc9a4e09600542958418a9e0d9380ca8c6d92f1cbf8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55bb7ed0787d4ae2af20fcf12fb830ef04dd73db4bfa5bb23d1961c6899b81f2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2008-09-08T18:49:33Z",
    "title_canon_sha256": "0a806970e5b22f10fc4ba852546b505817e47528f8d5042393876a93df28ff4e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.1404",
    "kind": "arxiv",
    "version": 1
  }
}