Pith Number

pith:OFYQ5FZ3

pith:2012:OFYQ5FZ3AIB3N2GO2L7XJMV64B

not attested not anchored not stored refs pending

Local algebraic approximation of semianalytic sets

Elisabetta Fortuna, Leslie Wilson, Massimo Ferrarotti

arxiv:1209.3123 v1 · 2012-09-14 · math.AG · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OFYQ5FZ3AIB3N2GO2L7XJMV64B}

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	2026-05-18T03:45:32.758990Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

71710e973b0203b6e8ced2ff74b2bee053d3658082f2c3dece393c0cb48ebc22

Aliases

arxiv: 1209.3123 · arxiv_version: 1209.3123v1 · doi: 10.48550/arxiv.1209.3123 · pith_short_12: OFYQ5FZ3AIB3 · pith_short_16: OFYQ5FZ3AIB3N2GO · pith_short_8: OFYQ5FZ3

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/OFYQ5FZ3AIB3N2GO2L7XJMV64B \
  | 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: 71710e973b0203b6e8ced2ff74b2bee053d3658082f2c3dece393c0cb48ebc22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "429ff41b87335afba687ecdfbcb5a5624f14660070f08529582d0ca96cf6bdea",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-09-14T08:28:05Z",
    "title_canon_sha256": "da37abfdabfc928c6172bfb65384fe65f197aab6a8d4a55c15692af9df26585e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.3123",
    "kind": "arxiv",
    "version": 1
  }
}