Pith Number

pith:TLNIP6VQ

pith:2018:TLNIP6VQR4PWLXC3ZLQ35LXOLM

not attested not anchored not stored refs pending

Assimilation of semi-qualitative observations with a stochastic Ensemble Kalman Filter

Abhishek Shah, Laurent Bertino, Mohamad El Gharamti

arxiv:1804.07648 v1 · 2018-04-20 · math.OC · stat.AP · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TLNIP6VQR4PWLXC3ZLQ35LXOLM}

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	2026-05-18T00:00:56.362769Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ada87fab08f1f65dc5bcae1beaeee5b11c9ef84bf0681b212c76eed26dc1dad

Aliases

arxiv: 1804.07648 · arxiv_version: 1804.07648v1 · doi: 10.48550/arxiv.1804.07648 · pith_short_12: TLNIP6VQR4PW · pith_short_16: TLNIP6VQR4PWLXC3 · pith_short_8: TLNIP6VQ

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/TLNIP6VQR4PWLXC3ZLQ35LXOLM \
  | 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: 9ada87fab08f1f65dc5bcae1beaeee5b11c9ef84bf0681b212c76eed26dc1dad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9242d7c3c27af6128030f302cfab681c4d2629408bf601d0c00d36d4d2ea994a",
    "cross_cats_sorted": [
      "stat.AP",
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-04-20T14:45:12Z",
    "title_canon_sha256": "6861c03a5b3649df87c400299a91cb545b688898e955be0a7c65c56ec0e5f35c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.07648",
    "kind": "arxiv",
    "version": 1
  }
}