Pith Number

pith:UGO43NFL

pith:2018:UGO43NFLCUUPSCD3AYN4X3XKO6

not attested not anchored not stored refs pending

Arveson extreme points span free spectrahedra

Eric Evert, J. William Helton

arxiv:1806.09053 v2 · 2018-06-23 · math.OA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UGO43NFLCUUPSCD3AYN4X3XKO6}

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.

Cited by

1 paper in Pith

Noncommutative partial convexity via $\Gamma$-convexity

Receipt and verification

First computed	2026-07-05T03:59:19.783647Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a19dcdb4ab1528f9087b061bcbeeea779197b0ea3e825e295dd31d4a547701fe

Aliases

arxiv: 1806.09053 · arxiv_version: 1806.09053v2 · doi: 10.48550/arxiv.1806.09053 · pith_short_12: UGO43NFLCUUP · pith_short_16: UGO43NFLCUUPSCD3 · pith_short_8: UGO43NFL

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/UGO43NFLCUUPSCD3AYN4X3XKO6 \
  | 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: a19dcdb4ab1528f9087b061bcbeeea779197b0ea3e825e295dd31d4a547701fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "973f1864a242f704bb3dd25e749c494ae22697397b53d65cf3e6f11d5ac76c5b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2018-06-23T23:42:44Z",
    "title_canon_sha256": "f74edeba503fbae2a2147146b7f2726a9babcb4fbb5a369f37c6da7e1ab83252"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.09053",
    "kind": "arxiv",
    "version": 2
  }
}