Pith Number

pith:4FXHCI3E

pith:2016:4FXHCI3E7I4QVOYHFM26SN3V6Y

not attested not anchored not stored refs pending

An obstruction to Delaunay triangulations in Riemannian manifolds

Arijit Ghosh, Jean-Daniel Boissonnat, Nikolay Martynchuk, Ramsay Dyer

arxiv:1612.02905 v1 · 2016-12-09 · cs.CG · math.DG · 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{4FXHCI3E7I4QVOYHFM26SN3V6Y}

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	2026-05-18T00:55:28.006735Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e16e712364fa390abb072b35e93775f6218b09c552f9b337cc5cf7b5cb6d294c

Aliases

arxiv: 1612.02905 · arxiv_version: 1612.02905v1 · doi: 10.48550/arxiv.1612.02905 · pith_short_12: 4FXHCI3E7I4Q · pith_short_16: 4FXHCI3E7I4QVOYH · pith_short_8: 4FXHCI3E

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/4FXHCI3E7I4QVOYHFM26SN3V6Y \
  | 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: e16e712364fa390abb072b35e93775f6218b09c552f9b337cc5cf7b5cb6d294c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10b76671a2be42cb27a32d90229ad272f405d493a469bd6f78e0bfe75ce14f27",
    "cross_cats_sorted": [
      "math.DG",
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2016-12-09T04:10:03Z",
    "title_canon_sha256": "25d67d05888a1b8844c4433fdcc7a36c8cd36dc019ae858397c733477f652864"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.02905",
    "kind": "arxiv",
    "version": 1
  }
}