Pith Number

pith:TQQZSDIJ

pith:2018:TQQZSDIJHZFMCWRF4XBWJCEWIO

not attested not anchored not stored refs pending

The Kowalewski's top revisited

Franco Magri

arxiv:1809.01879 v1 · 2018-09-06 · nlin.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TQQZSDIJHZFMCWRF4XBWJCEWIO}

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	2026-05-18T00:06:21.747491Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c21990d093e4ac15a25e5c3648896438e296f88e7b037c030d69a309f6a1df7

Aliases

arxiv: 1809.01879 · arxiv_version: 1809.01879v1 · doi: 10.48550/arxiv.1809.01879 · pith_short_12: TQQZSDIJHZFM · pith_short_16: TQQZSDIJHZFMCWRF · pith_short_8: TQQZSDIJ

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/TQQZSDIJHZFMCWRF4XBWJCEWIO \
  | 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: 9c21990d093e4ac15a25e5c3648896438e296f88e7b037c030d69a309f6a1df7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0219e714a7c2ececca1048af53852927dedc981b0ae8efec1051d651f907bb7d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2018-09-06T08:39:50Z",
    "title_canon_sha256": "65edb79cdc242521bc97bf16609fa2a4b0a486a36db3c2965e5228d08e668995"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.01879",
    "kind": "arxiv",
    "version": 1
  }
}