Pith Number

pith:RBER6UBB

pith:2015:RBER6UBBKSBU5PGQU6CCK7GT7R

not attested not anchored not stored refs pending

The hamburger theorem

Jan Kyn\v{c}l, Mikio Kano

arxiv:1503.06856 v4 · 2015-03-23 · math.MG · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RBER6UBBKSBU5PGQU6CCK7GT7R}

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	2026-05-17T23:58:15.332980Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

88491f502154834ebcd0a784257cd3fc48a0fe7bfb3852ce633b0ae9087a6bb3

Aliases

arxiv: 1503.06856 · arxiv_version: 1503.06856v4 · doi: 10.48550/arxiv.1503.06856 · pith_short_12: RBER6UBBKSBU · pith_short_16: RBER6UBBKSBU5PGQ · pith_short_8: RBER6UBB

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/RBER6UBBKSBU5PGQU6CCK7GT7R \
  | 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: 88491f502154834ebcd0a784257cd3fc48a0fe7bfb3852ce633b0ae9087a6bb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d883a25be60d804a3796cdb0578fae0d8c6a0882731589ddbe5fd19bbd2f7ae",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2015-03-23T21:57:59Z",
    "title_canon_sha256": "0cc0e941642ae3ff1edaac8bc850a657b0ca889ca26137d624f1bd73b102750d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.06856",
    "kind": "arxiv",
    "version": 4
  }
}