Pith Number

pith:ZT2DWSZP

pith:2021:ZT2DWSZPOD7AUE3YQSDSBC7UTN

not attested not anchored not stored refs pending

Auto-differentiable Ensemble Kalman Filters

Daniel Sanz-Alonso, Rebecca Willett, Yuming Chen

arxiv:2107.07687 v2 · 2021-07-16 · stat.ML · cs.LG · stat.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZT2DWSZPOD7AUE3YQSDSBC7UTN}

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	2026-07-05T02:59:25.076347Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccf43b4b2f70fe0a13788487208bf49b4cc1f66eb4f410a4aba268ba8f085de8

Aliases

arxiv: 2107.07687 · arxiv_version: 2107.07687v2 · doi: 10.48550/arxiv.2107.07687 · pith_short_12: ZT2DWSZPOD7A · pith_short_16: ZT2DWSZPOD7AUE3Y · pith_short_8: ZT2DWSZP

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/ZT2DWSZPOD7AUE3YQSDSBC7UTN \
  | 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: ccf43b4b2f70fe0a13788487208bf49b4cc1f66eb4f410a4aba268ba8f085de8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a3d6f1f561c143999ddd96d97e643cb66cf19c99f7295a46e27fecd65149d97",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2021-07-16T03:25:30Z",
    "title_canon_sha256": "a8082ce43db3e8ccd7c45685c4d2354c8cb15013fd9fc88da2226af2cfbe080c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.07687",
    "kind": "arxiv",
    "version": 2
  }
}