Pith Number

pith:EXWXCRBL

pith:2018:EXWXCRBLAYH4CXAMH74IGW6ZSX

not attested not anchored not stored refs pending

On turbulent friction in straight ducts with complex cross section: the wall law and the hydraulic diameter

Sergio Pirozzoli

arxiv:1804.02155 v1 · 2018-04-06 · 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{EXWXCRBLAYH4CXAMH74IGW6ZSX}

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	2026-05-18T00:15:14.798957Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25ed71442b060fc15c0c3ff8835bd995e228958ee0ac878068d73bd103557a06

Aliases

arxiv: 1804.02155 · arxiv_version: 1804.02155v1 · doi: 10.48550/arxiv.1804.02155 · pith_short_12: EXWXCRBLAYH4 · pith_short_16: EXWXCRBLAYH4CXAM · pith_short_8: EXWXCRBL

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/EXWXCRBLAYH4CXAMH74IGW6ZSX \
  | 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: 25ed71442b060fc15c0c3ff8835bd995e228958ee0ac878068d73bd103557a06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1600296d0fae46e00e95ed56092912e9761bca8bcd9a94296bc0547f902e38fa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2018-04-06T07:27:06Z",
    "title_canon_sha256": "b5d993f9001dffd9ab97d61f2b5bb7842bf88d125e138ebff84baefda5d796d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.02155",
    "kind": "arxiv",
    "version": 1
  }
}