Pith Number

pith:7ARNHVUN

pith:2014:7ARNHVUNRMXFT6Y7K7CWAKRL3O

not attested not anchored not stored refs pending

A one-phase problem for the fractional Laplacian: regularity of flat free boundaries

Daniela De Silva, Ovidiu Savin, Yannick Sire

arxiv:1401.6443 v1 · 2014-01-24 · 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{7ARNHVUNRMXFT6Y7K7CWAKRL3O}

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	2026-05-18T03:01:11.964029Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f822d3d68d8b2e59fb1f57c5602a2bdbbcb9f129a6ac815d935ee137212378d8

Aliases

arxiv: 1401.6443 · arxiv_version: 1401.6443v1 · doi: 10.48550/arxiv.1401.6443 · pith_short_12: 7ARNHVUNRMXF · pith_short_16: 7ARNHVUNRMXFT6Y7 · pith_short_8: 7ARNHVUN

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/7ARNHVUNRMXFT6Y7K7CWAKRL3O \
  | 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: f822d3d68d8b2e59fb1f57c5602a2bdbbcb9f129a6ac815d935ee137212378d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ebc143c0976c634bb12da413196265297f81520753c2b6869c6fa7e1bc51dd9d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2014-01-24T20:19:06Z",
    "title_canon_sha256": "67e507380e53b2c18d131cdd85a6ab60d322d32657e24c6f43b360c5d2b5695f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.6443",
    "kind": "arxiv",
    "version": 1
  }
}