Pith Number

pith:M33JR3RB

pith:2012:M33JR3RBSSNLOCQNFI7V446GS4

not attested not anchored not stored refs pending

How to Calculate Tortuosity Easily?

Maciej Matyka, Zbigniew Koza

arxiv:1203.5646 v1 · 2012-03-26 · physics.flu-dyn · physics.comp-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M33JR3RBSSNLOCQNFI7V446GS4}

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	2026-05-18T03:25:35.135223Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66f698ee21949ab70a0d2a3f5e73c6971c68cfe06d9b661f460c4bdda0b82f2c

Aliases

arxiv: 1203.5646 · arxiv_version: 1203.5646v1 · doi: 10.48550/arxiv.1203.5646 · pith_short_12: M33JR3RBSSNL · pith_short_16: M33JR3RBSSNLOCQN · pith_short_8: M33JR3RB

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/M33JR3RBSSNLOCQNFI7V446GS4 \
  | 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: 66f698ee21949ab70a0d2a3f5e73c6971c68cfe06d9b661f460c4bdda0b82f2c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22b2057c91bddf8c6bff75f0e243cb565b2f28c445012bc2be6f8b5a56bc9190",
    "cross_cats_sorted": [
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2012-03-26T12:39:52Z",
    "title_canon_sha256": "85752468cc1bf2b5fb0b4489f738e881a16f315921f2bce0f49834b36f7f452d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.5646",
    "kind": "arxiv",
    "version": 1
  }
}