Pith Number

pith:NEYN5SQ3

pith:2001:NEYN5SQ3XABNT4KEAZZOLHURWA

not attested not anchored not stored refs pending

Introductory Lectures on Contact Geometry

John B. Etnyre

arxiv:math/0111118 v2 · 2001-11-09 · math.SG · 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{NEYN5SQ3XABNT4KEAZZOLHURWA}

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.

Cited by

1 paper in Pith

Dynamics and Topology of Conformally Anosov Contact 3-Manifolds

Receipt and verification

First computed	2026-07-04T14:35:44.858774Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6930deca1bb802d9f1440672e59e91b00bff86074f32d4f688d68dcf1ddae439

Aliases

arxiv: math/0111118 · arxiv_version: math/0111118v2 · doi: 10.48550/arxiv.math/0111118 · pith_short_12: NEYN5SQ3XABN · pith_short_16: NEYN5SQ3XABNT4KE · pith_short_8: NEYN5SQ3

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/NEYN5SQ3XABNT4KEAZZOLHURWA \
  | 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: 6930deca1bb802d9f1440672e59e91b00bff86074f32d4f688d68dcf1ddae439

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ed089fb220680b15b9120d80f3e51291de5a958a5a0fd81c6da82c03248d84c",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "",
    "primary_cat": "math.SG",
    "submitted_at": "2001-11-09T15:26:21Z",
    "title_canon_sha256": "bb0ff33420dd327a6c6031ecf96c8e002ec7ae40297c34030ff418d34516652b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0111118",
    "kind": "arxiv",
    "version": 2
  }
}