Pith Number

pith:AEMB6QH2

pith:2008:AEMB6QH2XLRKOEYAFJRWY5GGCG

not attested not anchored not stored refs pending

Groebner deformations, connectedness and cohomological dimension

Matteo Varbaro

arxiv:0802.1800 v3 · 2008-02-13 · math.AC · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AEMB6QH2XLRKOEYAFJRWY5GGCG}

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	2026-05-18T04:12:56.613082Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

01181f40fabae2a713002a636c74c611a59bcb4257c3f1e827a1af8726d93514

Aliases

arxiv: 0802.1800 · arxiv_version: 0802.1800v3 · doi: 10.48550/arxiv.0802.1800 · pith_short_12: AEMB6QH2XLRK · pith_short_16: AEMB6QH2XLRKOEYA · pith_short_8: AEMB6QH2

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/AEMB6QH2XLRKOEYAFJRWY5GGCG \
  | 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: 01181f40fabae2a713002a636c74c611a59bcb4257c3f1e827a1af8726d93514

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a844a4a8cf0927f8c2c48cf028ed4a54dbe7f155d2b57ab7cd1b5cebcb4e761",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AC",
    "submitted_at": "2008-02-13T10:56:50Z",
    "title_canon_sha256": "4334a8fcc4ef886c3a2887460bff7a4cd980ba64a16e74c055f28a50be362923"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.1800",
    "kind": "arxiv",
    "version": 3
  }
}