Pith Number

pith:O7OIIHJF

pith:2019:O7OIIHJFWPPNJGWMDB5GWQONCQ

not attested not anchored not stored refs pending

Efficient Algorithms to Test Digital Convexity

Guilherme D. da Fonseca, Lo\"ic Crombez, Yan G\'erard

arxiv:1901.04738 v1 · 2019-01-15 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O7OIIHJFWPPNJGWMDB5GWQONCQ}

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	2026-05-17T23:56:21.883223Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77dc841d25b3ded49acc187a6b41cd142f48421ca930ba8c0abc283b497101c3

Aliases

arxiv: 1901.04738 · arxiv_version: 1901.04738v1 · doi: 10.48550/arxiv.1901.04738 · pith_short_12: O7OIIHJFWPPN · pith_short_16: O7OIIHJFWPPNJGWM · pith_short_8: O7OIIHJF

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/O7OIIHJFWPPNJGWMDB5GWQONCQ \
  | 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: 77dc841d25b3ded49acc187a6b41cd142f48421ca930ba8c0abc283b497101c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "749dd25d79f06e52ab5285de80061d2d9144c6adb8666d92ec227b069511f15e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2019-01-15T10:02:33Z",
    "title_canon_sha256": "53fde5c39a319ff1858d5abe8429aded961740ed4c793f8bbebf85c0a76b55fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.04738",
    "kind": "arxiv",
    "version": 1
  }
}