Pith Number

pith:T2EU5OK4

pith:2014:T2EU5OK42MH6I5DAKFQNP3CHFC

not attested not anchored not stored refs pending

POD/DEIM Reduced-Order Strategies for Efficient Four Dimensional Variational Data Assimilation

Adrian Sandu, Ionel Michael Navon, R\u{a}zvan \c{S}tef\u{a}nescu

arxiv:1402.5992 v3 · 2014-02-24 · cs.SY · 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{T2EU5OK42MH6I5DAKFQNP3CHFC}

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	2026-05-18T02:04:11.452729Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9e894eb95cd30fe474605160d7ec47288bb822eb204ba08c1c7b7516222dcb29

Aliases

arxiv: 1402.5992 · arxiv_version: 1402.5992v3 · doi: 10.48550/arxiv.1402.5992 · pith_short_12: T2EU5OK42MH6 · pith_short_16: T2EU5OK42MH6I5DA · pith_short_8: T2EU5OK4

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/T2EU5OK42MH6I5DAKFQNP3CHFC \
  | 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: 9e894eb95cd30fe474605160d7ec47288bb822eb204ba08c1c7b7516222dcb29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10a5e7ff3e1a46cac3e39798554d028aead34f838b728646394ecfa0163360fa",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2014-02-24T21:39:33Z",
    "title_canon_sha256": "ec699bcf6bcc8d010756a3ab13ee7ec5cd72e6cea9a09dc1685311fdde1ed638"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.5992",
    "kind": "arxiv",
    "version": 3
  }
}