Pith Number

pith:5GDZK2FC

pith:2004:5GDZK2FCPQX5AI7JA4KSYAR7GY

not attested not anchored not stored refs pending

Quadratic functors and one-connected two stage spaces

H.-J. Baues, T. Pirashvili

arxiv:math/0402250 v3 · 2004-02-16 · math.AT · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5GDZK2FCPQX5AI7JA4KSYAR7GY}

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	2026-07-04T14:38:14.714569Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9879568a27c2fd023e907152c023f363abcb7b88cd12015d79d006d1b74b3b9

Aliases

arxiv: math/0402250 · arxiv_version: math/0402250v3 · doi: 10.48550/arxiv.math/0402250 · pith_short_12: 5GDZK2FCPQX5 · pith_short_16: 5GDZK2FCPQX5AI7J · pith_short_8: 5GDZK2FC

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/5GDZK2FCPQX5AI7JA4KSYAR7GY \
  | 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: e9879568a27c2fd023e907152c023f363abcb7b88cd12015d79d006d1b74b3b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0cb8981d745acc343292c13a895b0473597cda517a439e6dc340db35ced2825",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "",
    "primary_cat": "math.AT",
    "submitted_at": "2004-02-16T02:50:50Z",
    "title_canon_sha256": "d4cd2a5e25dff5459276b2a9272a3a82630ee55e60686c1b8107ee79767733a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0402250",
    "kind": "arxiv",
    "version": 3
  }
}