Pith Number

pith:LWXP57HX

pith:2015:LWXP57HXSCHWWDP67OCTUS4ZBI

not attested not anchored not stored refs pending

The Variable Coefficient Thin Obstacle Problem: Optimal Regularity and Regularity of the Regular Free Boundary

Angkana R\"uland, Herbert Koch, Wenhui Shi

arxiv:1504.03525 v3 · 2015-04-14 · 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{LWXP57HXSCHWWDP67OCTUS4ZBI}

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	2026-05-18T01:18:47.330803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5daefefcf7908f6b0dfefb853a4b990a2206f4f24f3b52121e695e5187a6d5df

Aliases

arxiv: 1504.03525 · arxiv_version: 1504.03525v3 · doi: 10.48550/arxiv.1504.03525 · pith_short_12: LWXP57HXSCHW · pith_short_16: LWXP57HXSCHWWDP6 · pith_short_8: LWXP57HX

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/LWXP57HXSCHWWDP67OCTUS4ZBI \
  | 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: 5daefefcf7908f6b0dfefb853a4b990a2206f4f24f3b52121e695e5187a6d5df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6d6a2196f9d09e1bf226db03a777c9321fdde2418479a0c6d6b1196388fc72f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-04-14T12:46:12Z",
    "title_canon_sha256": "45e72b43feadcd5742e691594b2c6e3b3c909584cd5be94e1d1315461678af57"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.03525",
    "kind": "arxiv",
    "version": 3
  }
}