Pith Number

pith:HX4DIDHF

pith:2013:HX4DIDHFHRRI3HJ4OXQHCMY5HQ

not attested not anchored not stored refs pending

Free boundary on a cone

Hector Chang Lara, Mark Allen

arxiv:1301.6047 v1 · 2013-01-25 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HX4DIDHFHRRI3HJ4OXQHCMY5HQ}

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	2026-05-18T03:35:27.258085Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3df8340ce53c628d9d3c75e071331d3c05381dbac26d503edd2dd981c867ba5e

Aliases

arxiv: 1301.6047 · arxiv_version: 1301.6047v1 · doi: 10.48550/arxiv.1301.6047 · pith_short_12: HX4DIDHFHRRI · pith_short_16: HX4DIDHFHRRI3HJ4 · pith_short_8: HX4DIDHF

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/HX4DIDHFHRRI3HJ4OXQHCMY5HQ \
  | 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: 3df8340ce53c628d9d3c75e071331d3c05381dbac26d503edd2dd981c867ba5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a61d777882ca50a0afb6c0ee9c8cd888bd4d2ba9742ef10cc5ee82ea6d2ad42d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2013-01-25T14:25:58Z",
    "title_canon_sha256": "cb88569059560be90ffb0c448cb9140eb9e3e69e0aab04d2acd7e0c9ac6acfed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.6047",
    "kind": "arxiv",
    "version": 1
  }
}