Pith Number

pith:JEVODPYV

pith:2009:JEVODPYVGVQ4CAR4B3YFRA6O3R

not attested not anchored not stored refs pending

Non-separating spheres and twisted Heegaard Floer homology

Yi Ni

arxiv:0902.4034 v1 · 2009-02-23 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JEVODPYVGVQ4CAR4B3YFRA6O3R}

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	2026-05-18T02:41:51.335261Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

492ae1bf153561c1023c0ef05883cedc6f43291ce7253b7978b6dbf37b06a0e8

Aliases

arxiv: 0902.4034 · arxiv_version: 0902.4034v1 · doi: 10.48550/arxiv.0902.4034 · pith_short_12: JEVODPYVGVQ4 · pith_short_16: JEVODPYVGVQ4CAR4 · pith_short_8: JEVODPYV

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/JEVODPYVGVQ4CAR4B3YFRA6O3R \
  | 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: 492ae1bf153561c1023c0ef05883cedc6f43291ce7253b7978b6dbf37b06a0e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f40a8f3d9057ca4239bdb8e6b9a5aaa4b3ce146ba5eccf151d9aa863888d413e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2009-02-23T23:08:15Z",
    "title_canon_sha256": "0b36e3abf84d752c1ede5c1a1d22818f1c41039510b032def849e80d621e768e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4034",
    "kind": "arxiv",
    "version": 1
  }
}