Pith Number

pith:SWP6NC5O

pith:2004:SWP6NC5OIEZWI6SF5UTIE5AOFG

not attested not anchored not stored refs pending

Nonabelian Algebraic Topology

Ronald Brown

arxiv:math/0407275 v2 · 2004-07-15 · 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{SWP6NC5OIEZWI6SF5UTIE5AOFG}

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	2026-07-04T14:38:55.663241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

959fe68bae4133647a45ed2682740e29961c07807219784638beb5a3da179940

Aliases

arxiv: math/0407275 · arxiv_version: math/0407275v2 · doi: 10.48550/arxiv.math/0407275 · pith_short_12: SWP6NC5OIEZW · pith_short_16: SWP6NC5OIEZWI6SF · pith_short_8: SWP6NC5O

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/SWP6NC5OIEZWI6SF5UTIE5AOFG \
  | 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: 959fe68bae4133647a45ed2682740e29961c07807219784638beb5a3da179940

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "547913651a1d20f5bd7d334216038bf3b60e3ed2043b34f4508cbf1e6ba663d0",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "",
    "primary_cat": "math.AT",
    "submitted_at": "2004-07-15T13:26:31Z",
    "title_canon_sha256": "243148da20fb0f1f8c3a7788f9b1ed7e520cd3156637bd29346a84feadc19673"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0407275",
    "kind": "arxiv",
    "version": 2
  }
}