Pith Number

pith:FE2LE25B

pith:2021:FE2LE25BCIJQIEFZIZCITEU3RT

not attested not anchored not stored refs pending

Covariance Estimation from Compressive Data Partitions using a Projected Gradient-based Algorithm

Henry Arguello, I\~naki Esnaola, Jonathan Monsalve, Juan Ramirez

arxiv:2101.04027 v2 · 2021-01-11 · eess.IV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FE2LE25BCIJQIEFZIZCITEU3RT}

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	2026-07-05T04:43:31.823211Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2934b26ba112130410b9464489929b8cf3ba9c682c732fb7c0473f3e9beaad7a

Aliases

arxiv: 2101.04027 · arxiv_version: 2101.04027v2 · doi: 10.48550/arxiv.2101.04027 · pith_short_12: FE2LE25BCIJQ · pith_short_16: FE2LE25BCIJQIEFZ · pith_short_8: FE2LE25B

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/FE2LE25BCIJQIEFZIZCITEU3RT \
  | 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: 2934b26ba112130410b9464489929b8cf3ba9c682c732fb7c0473f3e9beaad7a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "749547432c63026106abe0046a464ef10c45d5816bb5cd69615570eb3ba16f2e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "eess.IV",
    "submitted_at": "2021-01-11T16:59:29Z",
    "title_canon_sha256": "e18dc703d40fc0a5e502a81713f70416e29c5769c56d80204517313d971fd42f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.04027",
    "kind": "arxiv",
    "version": 2
  }
}