Pith Number

pith:WVR7LPYP

pith:2013:WVR7LPYP7CZVTLZ3D6C6RMGX4G

not attested not anchored not stored refs pending

Regularity of the obstacle problem for the parabolic biharmonic equation

Matteo Novaga, Shinya Okabe

arxiv:1311.6569 v2 · 2013-11-26 · 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{WVR7LPYP7CZVTLZ3D6C6RMGX4G}

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	2026-05-18T02:51:49.539334Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b563f5bf0ff8b359af3b1f85e8b0d7e1be9976eab4543664c38a2aa421d7ad79

Aliases

arxiv: 1311.6569 · arxiv_version: 1311.6569v2 · doi: 10.48550/arxiv.1311.6569 · pith_short_12: WVR7LPYP7CZV · pith_short_16: WVR7LPYP7CZVTLZ3 · pith_short_8: WVR7LPYP

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/WVR7LPYP7CZVTLZ3D6C6RMGX4G \
  | 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: b563f5bf0ff8b359af3b1f85e8b0d7e1be9976eab4543664c38a2aa421d7ad79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02cc021f8951f9ae9cd472d1d1f0598086070b1f368b5096b449c979d7a8806a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2013-11-26T07:14:31Z",
    "title_canon_sha256": "2f5f830622eca102d348a2d5d05a72ef8a5236451ea49bc7028ccfaf31006f6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.6569",
    "kind": "arxiv",
    "version": 2
  }
}