Pith Number

pith:EZ7NAMVM

pith:2017:EZ7NAMVMZEVLNAXV5OUTFQVCV5

not attested not anchored not stored refs pending

Regularity of higher order in two-phase free boundary problems

Daniela De Silva, Fausto Ferrari, Sandro Salsa

arxiv:1701.07868 v2 · 2017-01-26 · 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{EZ7NAMVMZEVLNAXV5OUTFQVCV5}

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	2026-05-18T00:43:55.272523Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

267ed032acc92ab682f5eba932c2a2af76409336a0ee4116582545f53247eea1

Aliases

arxiv: 1701.07868 · arxiv_version: 1701.07868v2 · doi: 10.48550/arxiv.1701.07868 · pith_short_12: EZ7NAMVMZEVL · pith_short_16: EZ7NAMVMZEVLNAXV · pith_short_8: EZ7NAMVM

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/EZ7NAMVMZEVLNAXV5OUTFQVCV5 \
  | 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: 267ed032acc92ab682f5eba932c2a2af76409336a0ee4116582545f53247eea1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94eb0e23619de48fa17a418dbf9a8c934b40620733b2cfc7d7a82a368bee30c7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2017-01-26T20:29:09Z",
    "title_canon_sha256": "16dc3dc05889ac091dc5e9a1b1980381e4763ffdde3dbb5e39f8c0dcabfd6cb8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.07868",
    "kind": "arxiv",
    "version": 2
  }
}