Pith Number

pith:ODEQPN5Y

pith:2013:ODEQPN5YOM2ZGAPUFUYCJ6O6LI

not attested not anchored not stored refs pending

Variational Data Assimilation via Sparse Regularization

A.M. Ebtehaj, E. Foufoula-Georgiou, G. Lerman, M. Zupanski

arxiv:1306.1592 v1 · 2013-06-07 · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ODEQPN5YOM2ZGAPUFUYCJ6O6LI}

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	2026-05-18T02:49:10.077931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70c907b7b873359301f42d3024f9de5a0f8a89d3431a43e66679bcc0a2c762d6

Aliases

arxiv: 1306.1592 · arxiv_version: 1306.1592v1 · doi: 10.48550/arxiv.1306.1592 · pith_short_12: ODEQPN5YOM2Z · pith_short_16: ODEQPN5YOM2ZGAPU · pith_short_8: ODEQPN5Y

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/ODEQPN5YOM2ZGAPUFUYCJ6O6LI \
  | 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: 70c907b7b873359301f42d3024f9de5a0f8a89d3431a43e66679bcc0a2c762d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89eb670654a9f3e6c740cbdab92cb5d0e665a82bd36b9d1b9df18857cc1e5cb6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.data-an",
    "submitted_at": "2013-06-07T02:38:54Z",
    "title_canon_sha256": "836007ec4aaf19ff5a0ab668e7f60e03c7bc8e0ad3a8a2258c4703ccc3825cb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.1592",
    "kind": "arxiv",
    "version": 1
  }
}