Pith Number

pith:L74BHZ5C

pith:2016:L74BHZ5CMVGQN2SZDVCUSNU2HU

not attested not anchored not stored refs pending

A-expansion for multiple "hedgehog" shapes

Hossam Isack, Olga Veksler, Yuri Boykov

arxiv:1602.01006 v1 · 2016-02-02 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{L74BHZ5CMVGQN2SZDVCUSNU2HU}

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	2026-05-18T01:21:24.022219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5ff813e7a2654d06ea591d4549369a3d1776944fca7186102167f8fdd54b4147

Aliases

arxiv: 1602.01006 · arxiv_version: 1602.01006v1 · doi: 10.48550/arxiv.1602.01006 · pith_short_12: L74BHZ5CMVGQ · pith_short_16: L74BHZ5CMVGQN2SZ · pith_short_8: L74BHZ5C

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/L74BHZ5CMVGQN2SZDVCUSNU2HU \
  | 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: 5ff813e7a2654d06ea591d4549369a3d1776944fca7186102167f8fdd54b4147

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbc336d115ccd0a2d1edfe3215a0bc786faa0f621a35f68ba29aa7d7935a1170",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2016-02-02T16:42:27Z",
    "title_canon_sha256": "766984bcaa32e766e1d9f4d873d8575329f09ab1326eecc740cf18cde19afbf4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.01006",
    "kind": "arxiv",
    "version": 1
  }
}