Pith Number

pith:GBOM2MUX

pith:2010:GBOM2MUX25TCE3AKICUNS6YJII

not attested not anchored not stored refs pending

Arnold's problem on paper folding

Anton Petrunin

arxiv:1004.0545 v1 · 2010-04-05 · math.HO · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GBOM2MUX25TCE3AKICUNS6YJII}

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	2026-05-18T00:27:28.645598Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

305ccd3297d766226c0a40a8d97b094202d215b1a4a67884e7927f42d6a04aa4

Aliases

arxiv: 1004.0545 · arxiv_version: 1004.0545v1 · doi: 10.48550/arxiv.1004.0545 · pith_short_12: GBOM2MUX25TC · pith_short_16: GBOM2MUX25TCE3AK · pith_short_8: GBOM2MUX

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/GBOM2MUX25TCE3AKICUNS6YJII \
  | 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: 305ccd3297d766226c0a40a8d97b094202d215b1a4a67884e7927f42d6a04aa4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05f7976bb66cd584fc6c80fcec43df3045c38872c9bfb3eaade626f0e006bce4",
    "cross_cats_sorted": [
      "math.MG"
    ],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "math.HO",
    "submitted_at": "2010-04-05T00:55:33Z",
    "title_canon_sha256": "0d556f6abcb1effdbb426b8435db781c80f4db080465846f1b40cded8414c674"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.0545",
    "kind": "arxiv",
    "version": 1
  }
}