Pith Number

pith:53JVS47A

pith:2019:53JVS47A5Z43SDLIUOGUYXC6AW

not attested not anchored not stored refs pending

Unscented Kalman filter (UKF) based nonlinear parameter estimation for a turbulent boundary layer: a data assimilation framework

Jean-Pierre Hickey, Jonas P. R. Gustavsson, Louis N. Cattafesta III, Yang Zhang, Zhao Pan

arxiv:1908.07604 v2 · 2019-08-20 · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{53JVS47A5Z43SDLIUOGUYXC6AW}

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	2026-07-05T01:29:40.104909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eed35973e0ee79b90d68a38d4c5c5e059154eb717d86009c48ed899fcd1f1079

Aliases

arxiv: 1908.07604 · arxiv_version: 1908.07604v2 · doi: 10.48550/arxiv.1908.07604 · pith_short_12: 53JVS47A5Z43 · pith_short_16: 53JVS47A5Z43SDLI · pith_short_8: 53JVS47A

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/53JVS47A5Z43SDLIUOGUYXC6AW \
  | 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: eed35973e0ee79b90d68a38d4c5c5e059154eb717d86009c48ed899fcd1f1079

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b448a2c0471a6a005f0c8f70bb0cc66e583c5ab3fb175da91b894292d7003b0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2019-08-20T20:48:46Z",
    "title_canon_sha256": "133debcd7fe546c22bc2f85a927cec01e8e30ed428979d3ee4b4c73bd4af12d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.07604",
    "kind": "arxiv",
    "version": 2
  }
}