Pith Number

pith:KTZGVICG

pith:2021:KTZGVICGK47DB4K52DD2QRZSSA

not attested not anchored not stored refs pending

Efficient high-dimensional variational data assimilation with machine-learned reduced-order models

Bethany Lusch, Emil Constantinescu, Gianmarco Mengaldo, Ian Foster, Jiali Wang, Prasanna Balaprakash, Rao Kotamarthi, Romit Maulik, Vishwas Rao

arxiv:2112.07856 v1 · 2021-12-15 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KTZGVICGK47DB4K52DD2QRZSSA}

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	2026-07-05T03:41:07.783051Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54f26aa046573e30f15dd0c7a847329014ef044c80708309df7bcca6bcfad022

Aliases

arxiv: 2112.07856 · arxiv_version: 2112.07856v1 · doi: 10.48550/arxiv.2112.07856 · pith_short_12: KTZGVICGK47D · pith_short_16: KTZGVICGK47DB4K5 · pith_short_8: KTZGVICG

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/KTZGVICGK47DB4K52DD2QRZSSA \
  | 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: 54f26aa046573e30f15dd0c7a847329014ef044c80708309df7bcca6bcfad022

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "308f14576f21aac728f9c923d902350daaa5a117b913d5a339c3879aae11771a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2021-12-15T03:25:55Z",
    "title_canon_sha256": "f1e2aefbc9626287f0117a2256396ff52349a03bdff48027beb617c29c3a552e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.07856",
    "kind": "arxiv",
    "version": 1
  }
}