Pith Number

pith:THIHEXYB

pith:2012:THIHEXYBLZIICKXUDFG7ZDDM3N

not attested not anchored not stored refs pending

Semidefinite representation for convex hulls of real algebraic curves

Claus Scheiderer

arxiv:1208.3865 v4 · 2012-08-19 · 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{THIHEXYBLZIICKXUDFG7ZDDM3N}

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	2026-05-18T00:35:05.903566Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

99d0725f015e50812af4194dfc8c6cdb70d228b2470e1841a36a6c6a6b4e049b

Aliases

arxiv: 1208.3865 · arxiv_version: 1208.3865v4 · doi: 10.48550/arxiv.1208.3865 · pith_short_12: THIHEXYBLZII · pith_short_16: THIHEXYBLZIICKXU · pith_short_8: THIHEXYB

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/THIHEXYBLZIICKXUDFG7ZDDM3N \
  | 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: 99d0725f015e50812af4194dfc8c6cdb70d228b2470e1841a36a6c6a6b4e049b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5aa14d52902e9a722563d68eb2cff96c157718407b2828be1bf266cffb863fd1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-08-19T16:49:20Z",
    "title_canon_sha256": "dde031ce65c5cc765fcfda942de3777abfe83af497037038f96d061cd80a6792"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.3865",
    "kind": "arxiv",
    "version": 4
  }
}