Pith Number

pith:25ZXRIGV

pith:2019:25ZXRIGVGJ5BU3LPTKNYXVWYCU

not attested not anchored not stored refs pending

The regular free boundary in the thin obstacle problem for degenerate parabolic equations

Agnid Banerjee, Arshak Petrosyan, Donatella Danielli, Nicola Garofalo

arxiv:1906.06885 v1 · 2019-06-17 · 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{25ZXRIGVGJ5BU3LPTKNYXVWYCU}

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	2026-05-17T23:43:12.435411Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d77378a0d5327a1a6d6f9a9b8bd6d8152ebeeb607bc2e18ae6f2fbd6e028aed2

Aliases

arxiv: 1906.06885 · arxiv_version: 1906.06885v1 · doi: 10.48550/arxiv.1906.06885 · pith_short_12: 25ZXRIGVGJ5B · pith_short_16: 25ZXRIGVGJ5BU3LP · pith_short_8: 25ZXRIGV

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/25ZXRIGVGJ5BU3LPTKNYXVWYCU \
  | 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: d77378a0d5327a1a6d6f9a9b8bd6d8152ebeeb607bc2e18ae6f2fbd6e028aed2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8655644e55aa6d66f94b8d6b355269051fa0690bd5b201f3f6c5e2201d3be161",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-06-17T08:00:25Z",
    "title_canon_sha256": "69c3896c2ffd0acd43baefc998e7d5ee211aaae2b6550fe47f7ffa3276815120"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.06885",
    "kind": "arxiv",
    "version": 1
  }
}