Pith Number

pith:NU2S7BPV

pith:2012:NU2S7BPVMQVDLMST7YHMURNCQ3

not attested not anchored not stored refs pending

Containment problem for points on a reducible conic in $\mathbb{P}^2$

Annika Denkert, Mike Janssen

arxiv:1207.7153 v2 · 2012-07-31 · math.AG · math.AC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NU2S7BPVMQVDLMST7YHMURNCQ3}

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	2026-05-18T03:25:43.808497Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d352f85f5642a35b253fe0eca45a286c038c3781fb7918da3212d9fb90b3444

Aliases

arxiv: 1207.7153 · arxiv_version: 1207.7153v2 · doi: 10.48550/arxiv.1207.7153 · pith_short_12: NU2S7BPVMQVD · pith_short_16: NU2S7BPVMQVDLMST · pith_short_8: NU2S7BPV

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/NU2S7BPVMQVDLMST7YHMURNCQ3 \
  | 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: 6d352f85f5642a35b253fe0eca45a286c038c3781fb7918da3212d9fb90b3444

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4435bcaa8edc74dc8e92c06cd163e4ad5ce262533abd0515513cf722e94cbb09",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-07-31T03:17:30Z",
    "title_canon_sha256": "0ce3531b102d83a0757265d2bbc41ce677937dbed3dc1ec1be443c784596b50f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.7153",
    "kind": "arxiv",
    "version": 2
  }
}