Pith Number

pith:OTP52R4D

pith:2013:OTP52R4D3G7X3PEEZYWQHA2UEP

not attested not anchored not stored refs pending

The arc complex and contact geometry: non-destabilizable planar open book decompositions of the tight contact 3-sphere

John Etnyre, Youlin Li

arxiv:1305.5928 v1 · 2013-05-25 · math.GT · 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{OTP52R4D3G7X3PEEZYWQHA2UEP}

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	2026-05-18T03:24:53.310377Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74dfdd4783d9bf7dbc84ce2d03835423cfdfbe294adb81cd8e8d5d8ec028fd80

Aliases

arxiv: 1305.5928 · arxiv_version: 1305.5928v1 · doi: 10.48550/arxiv.1305.5928 · pith_short_12: OTP52R4D3G7X · pith_short_16: OTP52R4D3G7X3PEE · pith_short_8: OTP52R4D

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/OTP52R4D3G7X3PEEZYWQHA2UEP \
  | 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: 74dfdd4783d9bf7dbc84ce2d03835423cfdfbe294adb81cd8e8d5d8ec028fd80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea2c3dfc6e39c6dd28fa25b5548c176076c3d9a8d367a62b1e9106dc3d4a0443",
    "cross_cats_sorted": [
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2013-05-25T14:42:41Z",
    "title_canon_sha256": "9d39ae06bec44c5c62dc05870ed22341e0490cf03057d5e441673a3c4f5bdb91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.5928",
    "kind": "arxiv",
    "version": 1
  }
}