Pith Number

pith:YMFK5YHL

pith:2013:YMFK5YHLWZJZF2TBVQCPEYN42B

not attested not anchored not stored refs pending

Free boundary regularity for fully nonlinear non-homogeneous two-phase problems

D. De Silva, F. Ferrari, S.Salsa

arxiv:1304.0406 v2 · 2013-04-01 · 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{YMFK5YHLWZJZF2TBVQCPEYN42B}

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	2026-05-18T03:28:04.727817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c30aaee0ebb65392ea61ac04f261bcd04691fbfb8485668550ab96bf3fe26771

Aliases

arxiv: 1304.0406 · arxiv_version: 1304.0406v2 · doi: 10.48550/arxiv.1304.0406 · pith_short_12: YMFK5YHLWZJZ · pith_short_16: YMFK5YHLWZJZF2TB · pith_short_8: YMFK5YHL

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/YMFK5YHLWZJZF2TBVQCPEYN42B \
  | 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: c30aaee0ebb65392ea61ac04f261bcd04691fbfb8485668550ab96bf3fe26771

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c29d2a2d949beb250016da6407f6d4e3b8584bd17763301ed4bab3fe7fce958",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2013-04-01T18:09:53Z",
    "title_canon_sha256": "a15830b4bd3ff8ac26080fb2635e4da7f55963b8702307168442f2ad02d5596f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0406",
    "kind": "arxiv",
    "version": 2
  }
}