Pith Number

pith:DVQGU6QR

pith:2015:DVQGU6QRNUTBB37OC52VIFA3RO

not attested not anchored not stored refs pending

Regularity of the free boundary for two-phase problems governed by divergence form equations and applications

Daniela De Silva, Fausto Ferrari, Sandro Salsa

arxiv:1509.02571 v1 · 2015-09-08 · 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{DVQGU6QRNUTBB37OC52VIFA3RO}

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	2026-05-18T00:50:07.048542Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d606a7a116d2610efee177554141b8bb65769215a0cfb67c5f87b23cc782577

Aliases

arxiv: 1509.02571 · arxiv_version: 1509.02571v1 · doi: 10.48550/arxiv.1509.02571 · pith_short_12: DVQGU6QRNUTB · pith_short_16: DVQGU6QRNUTBB37O · pith_short_8: DVQGU6QR

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/DVQGU6QRNUTBB37OC52VIFA3RO \
  | 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: 1d606a7a116d2610efee177554141b8bb65769215a0cfb67c5f87b23cc782577

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b54d43abd192b07f58ee9ea0acc3d1721ca9ff4e6f8217cba0c18e04d29fd77",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-09-08T22:16:31Z",
    "title_canon_sha256": "0fb599342a54948465e1b3a324d9c18883e63fa31e73d38cf06ee5184506ee33"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.02571",
    "kind": "arxiv",
    "version": 1
  }
}