Pith Number

pith:5TZ33KTH

pith:2016:5TZ33KTH3WMIMS6W4UINRHEQOV

not attested not anchored not stored refs pending

Circular Free Spectrahedra

Eric Evert, Igor Klep, J. William Helton, Scott McCullough

arxiv:1604.05756 v1 · 2016-04-19 · 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{5TZ33KTH3WMIMS6W4UINRHEQOV}

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	2026-05-18T00:17:30.830987Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ecf3bdaa67dd98864bd6e510d89c90755fa4e344e4118dfc2706f7a273687006

Aliases

arxiv: 1604.05756 · arxiv_version: 1604.05756v1 · doi: 10.48550/arxiv.1604.05756 · pith_short_12: 5TZ33KTH3WMI · pith_short_16: 5TZ33KTH3WMIMS6W · pith_short_8: 5TZ33KTH

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/5TZ33KTH3WMIMS6W4UINRHEQOV \
  | 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: ecf3bdaa67dd98864bd6e510d89c90755fa4e344e4118dfc2706f7a273687006

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a4a5247f243eb68e1c0ec63834118117ca1551cb9c50b3a939922a6e44f81c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2016-04-19T21:36:36Z",
    "title_canon_sha256": "8424b77323668065ed818d44dccf1f568a5157d09d3605b15419fef26b1e21a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.05756",
    "kind": "arxiv",
    "version": 1
  }
}