Pith Number

pith:X7RB4UHI

pith:2019:X7RB4UHIAO3FQOSMDNJIJ5OOAO

not attested not anchored not stored refs pending

Well-Posedness of Sparse Frequency Estimation

Benedikt Diederichs

arxiv:1905.08005 v1 · 2019-05-20 · math.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X7RB4UHIAO3FQOSMDNJIJ5OOAO}

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.

Cited by

1 paper in Pith

The spectral properties of Vandermonde matrices with clustered nodes

Receipt and verification

First computed	2026-05-17T23:45:47.903420Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bfe21e50e803b6583a4c1b5284f5ce0397ea5d869523cb6780940f1d34edf91f

Aliases

arxiv: 1905.08005 · arxiv_version: 1905.08005v1 · doi: 10.48550/arxiv.1905.08005 · pith_short_12: X7RB4UHIAO3F · pith_short_16: X7RB4UHIAO3FQOSM · pith_short_8: X7RB4UHI

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/X7RB4UHIAO3FQOSMDNJIJ5OOAO \
  | 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: bfe21e50e803b6583a4c1b5284f5ce0397ea5d869523cb6780940f1d34edf91f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "71bd1a37084ae9200361f5ea422c4c5ed73a884c0323c256ae7f46258eb1d0ae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-05-20T11:35:37Z",
    "title_canon_sha256": "89bd280f223bb287ab079b219c3658e1022a7a2492b3d32fcf57c29a74a4d633"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.08005",
    "kind": "arxiv",
    "version": 1
  }
}