Pith Number

pith:FNBETYI4

pith:2012:FNBETYI42BKTZZHBYFM4ESMZ5M

not attested not anchored not stored refs pending

Two-phase problems with distributed source: regularity of the free boundary

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

arxiv:1210.7226 v1 · 2012-10-26 · 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{FNBETYI42BKTZZHBYFM4ESMZ5M}

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	2026-05-18T01:22:26.111499Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b4249e11cd0553ce4e1c159c24999eb12f66ebaa1a8adf2dc696ea11e8a99e6

Aliases

arxiv: 1210.7226 · arxiv_version: 1210.7226v1 · doi: 10.48550/arxiv.1210.7226 · pith_short_12: FNBETYI42BKT · pith_short_16: FNBETYI42BKTZZHB · pith_short_8: FNBETYI4

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/FNBETYI42BKTZZHBYFM4ESMZ5M \
  | 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: 2b4249e11cd0553ce4e1c159c24999eb12f66ebaa1a8adf2dc696ea11e8a99e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76735fa6202e44ba2320898008e8ff6e2de08c0d3e4b2e4b9f2a7fd74b1d1967",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2012-10-26T19:37:19Z",
    "title_canon_sha256": "bde7edd1c766c4b3dd3e042c53d2a7f59af15b3fa210fca18d2e3a0880594566"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.7226",
    "kind": "arxiv",
    "version": 1
  }
}