Pith Number

pith:NAA2M33N

pith:2015:NAA2M33NOQPEIWLIOUNYEI7UN3

not attested not anchored not stored refs pending

The Matzoh Ball Soup Problem: a complete characterization

Michele Marini, Rolando Magnanini

arxiv:1505.02638 v1 · 2015-05-11 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NAA2M33NOQPEIWLIOUNYEI7UN3}

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	2026-05-18T02:16:11.983361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6801a66f6d741e445968751b8223f46eed2c18e6dcf7c002e19a28915fb212c9

Aliases

arxiv: 1505.02638 · arxiv_version: 1505.02638v1 · doi: 10.48550/arxiv.1505.02638 · pith_short_12: NAA2M33NOQPE · pith_short_16: NAA2M33NOQPEIWLI · pith_short_8: NAA2M33N

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/NAA2M33NOQPEIWLIOUNYEI7UN3 \
  | 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: 6801a66f6d741e445968751b8223f46eed2c18e6dcf7c002e19a28915fb212c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fbb3b107c90efe0f072079d6f5a4bc1c8c547239efbe037fe729cfeb400d9f6f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-05-11T14:29:40Z",
    "title_canon_sha256": "ea78e5383f65e47242522e55401fdb5ad09ee3c5dd22ca8d12858010d29273d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.02638",
    "kind": "arxiv",
    "version": 1
  }
}