Pith Number

pith:EHP222EI

pith:2023:EHP222EIHCDNIQAFIFC22TEIWB

not attested not anchored not stored refs pending

The Conditioning of Hybrid Variational Data Assimilation

Amos S. Lawless, Nancy K. Nichols, Shaerdan Shataer

arxiv:2306.11869 v1 · 2023-06-20 · math.NA · cs.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{EHP222EIHCDNIQAFIFC22TEIWB}

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	2026-07-05T06:23:07.942175Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21dfad68883886d440054145ad4c88b07c61589a6f02e8380545d40eaf9ae1b5

Aliases

arxiv: 2306.11869 · arxiv_version: 2306.11869v1 · doi: 10.48550/arxiv.2306.11869 · pith_short_12: EHP222EIHCDN · pith_short_16: EHP222EIHCDNIQAF · pith_short_8: EHP222EI

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/EHP222EIHCDNIQAFIFC22TEIWB \
  | 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: 21dfad68883886d440054145ad4c88b07c61589a6f02e8380545d40eaf9ae1b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dfd4ed17d48c1c09969984f1061064b66ab27c9e1c5ff65e941fa6f44af077d9",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2023-06-20T20:02:53Z",
    "title_canon_sha256": "f063bbe10817cf81c561d7804d94239eadf57210665772d8c41a3be7d8675d5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2306.11869",
    "kind": "arxiv",
    "version": 1
  }
}