Pith Number

pith:IQUJJSXL

pith:2019:IQUJJSXLUAKH4XADHG22NFUMPN

not attested not anchored not stored refs pending

Minimization and Steiner symmetry of the first eigenvalue for a fractional eigenvalue problem with indefinite weight

Claudia Anedda, Fabrizio Cuccu, Silvia Frassu

arxiv:1904.02923 v1 · 2019-04-05 · 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{IQUJJSXLUAKH4XADHG22NFUMPN}

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	2026-05-17T23:49:19.218267Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

442894caeba0147e5c0339b5a6968c7b7af77c5dfb748c42a0d4962844a2e221

Aliases

arxiv: 1904.02923 · arxiv_version: 1904.02923v1 · doi: 10.48550/arxiv.1904.02923 · pith_short_12: IQUJJSXLUAKH · pith_short_16: IQUJJSXLUAKH4XAD · pith_short_8: IQUJJSXL

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/IQUJJSXLUAKH4XADHG22NFUMPN \
  | 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: 442894caeba0147e5c0339b5a6968c7b7af77c5dfb748c42a0d4962844a2e221

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2d875208f1673bd4ca68eb32459d616449b521d820c7721b62e22aee4e9b21b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-04-05T08:08:29Z",
    "title_canon_sha256": "46190791a371e0bd77cc51d879de1d917c96e0068fe745e1bde9f265cbbe47de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02923",
    "kind": "arxiv",
    "version": 1
  }
}