Pith Number

pith:R356R72D

pith:2011:R356R72DBBPAZ2IBCXZMQAIHJY

not attested not anchored not stored refs pending

Approximating amoebas and coamoebas by sums of squares

Thorsten Theobald, Timo de Wolff

arxiv:1101.4114 v3 · 2011-01-21 · 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{R356R72DBBPAZ2IBCXZMQAIHJY}

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	2026-05-18T03:21:08.789775Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8efbe8ff43085e0ce90115f2c801074e3a40a45ef403ca674e28174697d4d004

Aliases

arxiv: 1101.4114 · arxiv_version: 1101.4114v3 · doi: 10.48550/arxiv.1101.4114 · pith_short_12: R356R72DBBPA · pith_short_16: R356R72DBBPAZ2IB · pith_short_8: R356R72D

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/R356R72DBBPAZ2IBCXZMQAIHJY \
  | 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: 8efbe8ff43085e0ce90115f2c801074e3a40a45ef403ca674e28174697d4d004

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dff913c9cfce9c838a39a31b3f33a64fc968b224c70b9c6136c1219c6c84013",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2011-01-21T11:33:12Z",
    "title_canon_sha256": "401e7e704b16618d643572540ef4bc9a0088b399140b975fdd2d82b607369d38"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4114",
    "kind": "arxiv",
    "version": 3
  }
}