Pith Number

pith:2B7RS6UD

pith:2008:2B7RS6UDRZZDJXF4OSMJECOQMM

not attested not anchored not stored refs pending

Homotopy Type of Disentanglements of Multi-germs

Kevin Houston

arxiv:0807.3662 v1 · 2008-07-23 · math.AG · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2B7RS6UDRZZDJXF4OSMJECOQMM}

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	2026-05-18T02:15:44.632465Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d07f197a838e7234dcbc74989209d063315423e75c1809ba945f98260e55ba56

Aliases

arxiv: 0807.3662 · arxiv_version: 0807.3662v1 · doi: 10.48550/arxiv.0807.3662 · pith_short_12: 2B7RS6UDRZZD · pith_short_16: 2B7RS6UDRZZDJXF4 · pith_short_8: 2B7RS6UD

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/2B7RS6UDRZZDJXF4OSMJECOQMM \
  | 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: d07f197a838e7234dcbc74989209d063315423e75c1809ba945f98260e55ba56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ec8908728991725a4687597488f6978e2b35fb69b09a8a08a00911cc3e8c535",
    "cross_cats_sorted": [
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-07-23T13:34:29Z",
    "title_canon_sha256": "a35c86734e37cc8d3ed21376abd24ce2f8b17b06b1e7fae90efa6ccdc6760504"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.3662",
    "kind": "arxiv",
    "version": 1
  }
}