Pith Number

pith:G32A44OX

pith:2015:G32A44OXS2NEQDJ6GQ3VBFOE4E

not attested not anchored not stored refs pending

Free Boundary Problems: The Forefront of Current and Future Developments

Gui-Qiang Chen, Henrik Shahgholian, Juan-Luis Vazquez

arxiv:1508.00918 v1 · 2015-08-04 · 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{G32A44OXS2NEQDJ6GQ3VBFOE4E}

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	2026-05-18T01:35:52.724567Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

36f40e71d7969a480d3e34375095c4e127c5e9291a14c8c56316977e7009384a

Aliases

arxiv: 1508.00918 · arxiv_version: 1508.00918v1 · doi: 10.48550/arxiv.1508.00918 · pith_short_12: G32A44OXS2NE · pith_short_16: G32A44OXS2NEQDJ6 · pith_short_8: G32A44OX

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/G32A44OXS2NEQDJ6GQ3VBFOE4E \
  | 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: 36f40e71d7969a480d3e34375095c4e127c5e9291a14c8c56316977e7009384a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca3b9c95e7c9f1ed16a9874823e23c1b4fd08e302706aa6743383ba130f3a0d3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-08-04T20:46:01Z",
    "title_canon_sha256": "93b2c78b96e6c1e12e3317cba95d0dab7de2134c0ac58b47e242f390263f6b5f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.00918",
    "kind": "arxiv",
    "version": 1
  }
}