Pith Number

pith:EYG43NUQ

pith:2011:EYG43NUQJHH26BNRMX3ZLZKZWL

not attested not anchored not stored refs pending

An Efficient Algorithm for Maximum-Entropy Extension of Block-Circulant Covariance Matrices

Augusto Ferrante, Francesca P. Carli, Giorgio Picci, Michele Pavon

arxiv:1107.2465 v2 · 2011-07-13 · math.OC · cs.IT · cs.SY · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EYG43NUQJHH26BNRMX3ZLZKZWL}

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	2026-05-18T00:18:56.289733Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

260dcdb69049cfaf05b165f795e559b2f082d6e2948c4602a5d16cdebb93aade

Aliases

arxiv: 1107.2465 · arxiv_version: 1107.2465v2 · doi: 10.48550/arxiv.1107.2465 · pith_short_12: EYG43NUQJHH2 · pith_short_16: EYG43NUQJHH26BNR · pith_short_8: EYG43NUQ

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/EYG43NUQJHH26BNRMX3ZLZKZWL \
  | 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: 260dcdb69049cfaf05b165f795e559b2f082d6e2948c4602a5d16cdebb93aade

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f437b3e4c5365ce49b4551541c1cf45426182753661417277e871ef56405397",
    "cross_cats_sorted": [
      "cs.IT",
      "cs.SY",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2011-07-13T05:18:59Z",
    "title_canon_sha256": "1d3b0fecfc0e04a652c3d6320e4a325e17158b3ce3bd1f065250eb65797c372a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.2465",
    "kind": "arxiv",
    "version": 2
  }
}