Pith Number

pith:ZYMHLUJB

pith:2019:ZYMHLUJB5KO6FKLCRCCQISDN26

not attested not anchored not stored refs pending

Use of convexity in contour detection

Victor Churchill

arxiv:1905.13187 v1 · 2019-05-30 · eess.IV · cs.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{ZYMHLUJB5KO6FKLCRCCQISDN26}

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	2026-05-17T23:44:38.704343Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce1875d121ea9de2a962888504486dd7b92b0cdb707b8bb12050b1bb2cb7c37a

Aliases

arxiv: 1905.13187 · arxiv_version: 1905.13187v1 · doi: 10.48550/arxiv.1905.13187 · pith_short_12: ZYMHLUJB5KO6 · pith_short_16: ZYMHLUJB5KO6FKLC · pith_short_8: ZYMHLUJB

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/ZYMHLUJB5KO6FKLCRCCQISDN26 \
  | 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: ce1875d121ea9de2a962888504486dd7b92b0cdb707b8bb12050b1bb2cb7c37a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cad2632e7712f6fdd80650da24d270e21805d49bcad10405615ed38b97063813",
    "cross_cats_sorted": [
      "cs.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.IV",
    "submitted_at": "2019-05-30T17:13:22Z",
    "title_canon_sha256": "48513c280214d7bf3627eac7f9378cc36d19d4fb06ae8a999e4e4ea8f71da9a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.13187",
    "kind": "arxiv",
    "version": 1
  }
}