Pith Number

pith:ULKXV2EM

pith:2016:ULKXV2EMP76JVALO2VUYHW5Y3B

not attested not anchored not stored refs pending

A characterization of the ball

Erlend Forn{\ae}ss Wold, John Erik Forn{\ae}ss, Klas Diederich

arxiv:1604.05057 v1 · 2016-04-18 · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ULKXV2EMP76JVALO2VUYHW5Y3B}

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	2026-05-18T01:16:55.896917Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2d57ae88c7ffc9a816ed56983dbb8d86392f878e8ad223638b4b1055ddffd9b

Aliases

arxiv: 1604.05057 · arxiv_version: 1604.05057v1 · doi: 10.48550/arxiv.1604.05057 · pith_short_12: ULKXV2EMP76J · pith_short_16: ULKXV2EMP76JVALO · pith_short_8: ULKXV2EM

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/ULKXV2EMP76JVALO2VUYHW5Y3B \
  | 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: a2d57ae88c7ffc9a816ed56983dbb8d86392f878e8ad223638b4b1055ddffd9b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "225a74a487f0b2f36fd3dc7f6c45bee09c2047f9fce705447057b37ca3f78c8d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2016-04-18T09:34:22Z",
    "title_canon_sha256": "9e38fc34b87a1a42df5385a7e1830849db69da995a5a859e93b403717c467340"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.05057",
    "kind": "arxiv",
    "version": 1
  }
}