Pith Number

pith:L5F2D2CE

pith:2018:L5F2D2CEQDCHXH7I5STGHGOQKD

not attested not anchored not stored refs pending

Data Assimilation: The Schr\"odinger Perspective

Sebastian Reich

arxiv:1807.08351 v5 · 2018-07-22 · 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{L5F2D2CEQDCHXH7I5STGHGOQKD}

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	2026-06-04T19:12:08.717309Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f4ba1e84480c47b9fe8eca66399d050e7445a09e894c883475d98798bbbeb62

Aliases

arxiv: 1807.08351 · arxiv_version: 1807.08351v5 · doi: 10.48550/arxiv.1807.08351 · pith_short_12: L5F2D2CEQDCH · pith_short_16: L5F2D2CEQDCHXH7I · pith_short_8: L5F2D2CE

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/L5F2D2CEQDCHXH7I5STGHGOQKD \
  | 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: 5f4ba1e84480c47b9fe8eca66399d050e7445a09e894c883475d98798bbbeb62

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a8618e4fb9769c6360308e2f0ddaf00e653a5e79fd07411684c15db67592394",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-07-22T19:20:55Z",
    "title_canon_sha256": "fec9c1dfce2648dc62fc1908e986eb937e8f50b20a760ae3b8166d51a7bfb356"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.08351",
    "kind": "arxiv",
    "version": 5
  }
}