Pith Number

pith:I3KKAIWX

pith:2017:I3KKAIWXEYQVB7YSDDFAOVZGCA

not attested not anchored not stored refs pending

Nilpotent Approximations of Sub-Riemannian Distances for Fast Perceptual Grouping of Blood Vessels in 2D and 3D

Da Chen, Erik J. Bekkers, Jorg M. Portegies

arxiv:1707.02811 v2 · 2017-07-10 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I3KKAIWXEYQVB7YSDDFAOVZGCA}

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	2026-05-18T00:31:02.666031Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46d4a022d7262150ff1218ca07572610110bbc08736a8e1a56373b2f7cd2e960

Aliases

arxiv: 1707.02811 · arxiv_version: 1707.02811v2 · doi: 10.48550/arxiv.1707.02811 · pith_short_12: I3KKAIWXEYQV · pith_short_16: I3KKAIWXEYQVB7YS · pith_short_8: I3KKAIWX

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/I3KKAIWXEYQVB7YSDDFAOVZGCA \
  | 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: 46d4a022d7262150ff1218ca07572610110bbc08736a8e1a56373b2f7cd2e960

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d575ce28f3a33a60e2d0bf423b0f16fa9bd936ba39647b57e6f9cecf339f0658",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2017-07-10T11:49:39Z",
    "title_canon_sha256": "2a3b01531058fc73ead058b01cfa7d9c2ab3947aa73a785aaf67e0aef49c331a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.02811",
    "kind": "arxiv",
    "version": 2
  }
}