Pith Number

pith:ZAJWSDQB

pith:2012:ZAJWSDQBD4IHX2BMMU2QGSPYDC

not attested not anchored not stored refs pending

A Topological Code for Plane Images

Evgeny Shchepin

arxiv:1212.0819 v1 · 2012-12-04 · cs.CV · 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{ZAJWSDQBD4IHX2BMMU2QGSPYDC}

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	2026-05-18T03:39:15.143054Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c813690e011f107be82c65350349f81886a5ce7c175702029db5afd9bb2d431a

Aliases

arxiv: 1212.0819 · arxiv_version: 1212.0819v1 · doi: 10.48550/arxiv.1212.0819 · pith_short_12: ZAJWSDQBD4IH · pith_short_16: ZAJWSDQBD4IHX2BM · pith_short_8: ZAJWSDQB

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/ZAJWSDQBD4IHX2BMMU2QGSPYDC \
  | 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: c813690e011f107be82c65350349f81886a5ce7c175702029db5afd9bb2d431a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9112804295538625bff6815aceb9bbd5a48d45e128db38f50a79b55966f45b32",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2012-12-04T18:39:14Z",
    "title_canon_sha256": "e72d86dc10abed34990489efe82f5eb2654e17b87da45add4ac4c9a6ae2c9ebb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.0819",
    "kind": "arxiv",
    "version": 1
  }
}