Pith Number

pith:R66DZCDZ

pith:2019:R66DZCDZPTUXJN6VQE4CCLX5FO

not attested not anchored not stored refs pending

Roughness effects in laminar pipe flow

Alexander J. Smits, Utku Senturk

arxiv:1905.12479 v1 · 2019-05-29 · 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{R66DZCDZPTUXJN6VQE4CCLX5FO}

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	2026-05-17T23:44:44.138684Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8fbc3c88797ce974b7d58138212efd2b917fd0fa0687f2e671849d4a052d0dcb

Aliases

arxiv: 1905.12479 · arxiv_version: 1905.12479v1 · doi: 10.48550/arxiv.1905.12479 · pith_short_12: R66DZCDZPTUX · pith_short_16: R66DZCDZPTUXJN6V · pith_short_8: R66DZCDZ

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/R66DZCDZPTUXJN6VQE4CCLX5FO \
  | 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: 8fbc3c88797ce974b7d58138212efd2b917fd0fa0687f2e671849d4a052d0dcb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6cec7a3c7a4c3bfcfcc9bf9180686470b6fcc04dc480a4c33ca5a634b50c045d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2019-05-29T14:16:05Z",
    "title_canon_sha256": "f2131abdb9e90ed85cf6aaa749d40bb432233b0ee9503a18679e0db71e9e7693"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.12479",
    "kind": "arxiv",
    "version": 1
  }
}