Pith Number

pith:FUHMRH6Q

pith:2010:FUHMRH6QACUENK75KHKVN3HDGS

not attested not anchored not stored refs pending

Contact surgery and transverse invariants

Andras I. Stipsicz, Paolo Lisca

arxiv:1005.2813 v2 · 2010-05-17 · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FUHMRH6QACUENK75KHKVN3HDGS}

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	2026-05-18T02:23:59.433828Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d0ec89fd000a846abfd51d556ece334b17011536df594c675b79912e1d66d90

Aliases

arxiv: 1005.2813 · arxiv_version: 1005.2813v2 · doi: 10.48550/arxiv.1005.2813 · pith_short_12: FUHMRH6QACUE · pith_short_16: FUHMRH6QACUENK75 · pith_short_8: FUHMRH6Q

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/FUHMRH6QACUENK75KHKVN3HDGS \
  | 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: 2d0ec89fd000a846abfd51d556ece334b17011536df594c675b79912e1d66d90

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5327c51aa25386dee5166f0d465f54c7ee15f4957ee386c66f0ea5fb97b4427c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2010-05-17T06:36:53Z",
    "title_canon_sha256": "ff164c5116bfd8da62528a219f67dcdb64d3a70c3b55538bcefdae8baf0f0607"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.2813",
    "kind": "arxiv",
    "version": 2
  }
}