Pith Number

pith:7UTPN2FM

pith:2017:7UTPN2FMICPBPLFQHT53KZL354

not attested not anchored not stored refs pending

How to cut a cake with a gram matrix

Guillaume Ch\`eze (IMT), Luca Amodei (IMT)

arxiv:1707.02871 v1 · 2017-07-07 · cs.GT · cs.MA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7UTPN2FMICPBPLFQHT53KZL354}

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	2026-05-18T00:40:35.554210Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd26f6e8ac409e17acb03cfbb5657bef2e85ac654469d0f4b95c753143c59e32

Aliases

arxiv: 1707.02871 · arxiv_version: 1707.02871v1 · doi: 10.48550/arxiv.1707.02871 · pith_short_12: 7UTPN2FMICPB · pith_short_16: 7UTPN2FMICPBPLFQ · pith_short_8: 7UTPN2FM

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/7UTPN2FMICPBPLFQHT53KZL354 \
  | 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: fd26f6e8ac409e17acb03cfbb5657bef2e85ac654469d0f4b95c753143c59e32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "943ae0bbdf5587f246e04362df1b617e91f28488d335c8a99c60de0a3b19edb0",
    "cross_cats_sorted": [
      "cs.MA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GT",
    "submitted_at": "2017-07-07T09:21:18Z",
    "title_canon_sha256": "5b719b3c9d0f2d62f4913afe78052cad31109bc175800f1c78b9a1c1ba1bd5e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.02871",
    "kind": "arxiv",
    "version": 1
  }
}