Pith Number

pith:BD7G2P4V

pith:2012:BD7G2P4VIP3R3WM6BW3JD2UR2T

not attested not anchored not stored refs pending

Good covers are algorithmically unrecognizable

Dmitry Tonkonog, Martin Tancer

arxiv:1205.6082 v2 · 2012-05-28 · cs.CG · math.AT · 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{BD7G2P4VIP3R3WM6BW3JD2UR2T}

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	2026-05-18T01:13:05.302901Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08fe6d3f9543f71dd99e0db691ea91d4e7cc658b9de9c231f4104513978d4c1a

Aliases

arxiv: 1205.6082 · arxiv_version: 1205.6082v2 · doi: 10.48550/arxiv.1205.6082 · pith_short_12: BD7G2P4VIP3R · pith_short_16: BD7G2P4VIP3R3WM6 · pith_short_8: BD7G2P4V

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/BD7G2P4VIP3R3WM6BW3JD2UR2T \
  | 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: 08fe6d3f9543f71dd99e0db691ea91d4e7cc658b9de9c231f4104513978d4c1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9813ebd3e72d4d9835ce6dd276132b8a8a7415b10951e1cafd6144687fcf1167",
    "cross_cats_sorted": [
      "math.AT",
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2012-05-28T11:36:17Z",
    "title_canon_sha256": "3b51c639556165959717643d24db4a651e347e0300858daa86a9b03e3fb37da5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.6082",
    "kind": "arxiv",
    "version": 2
  }
}