Pith Number

pith:6H6UMH7M

pith:2013:6H6UMH7M2UGMKF44KJZOPRHUF6

not attested not anchored not stored refs pending

A strange bridge by Leonardo

Dirk Huylebrouck

arxiv:1311.2857 v1 · 2013-11-12 · math.HO · physics.hist-ph · physics.pop-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{6H6UMH7M2UGMKF44KJZOPRHUF6}

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	2026-05-18T03:07:21.738234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f1fd461fecd50cc5179c5272e7c4f42f935f96c3bc326c145fd2065fd3db63e6

Aliases

arxiv: 1311.2857 · arxiv_version: 1311.2857v1 · doi: 10.48550/arxiv.1311.2857 · pith_short_12: 6H6UMH7M2UGM · pith_short_16: 6H6UMH7M2UGMKF44 · pith_short_8: 6H6UMH7M

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/6H6UMH7M2UGMKF44KJZOPRHUF6 \
  | 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: f1fd461fecd50cc5179c5272e7c4f42f935f96c3bc326c145fd2065fd3db63e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80d1b5562f322ab2248b949f88258488aac2a241228380208b6af6e7f9693af7",
    "cross_cats_sorted": [
      "physics.hist-ph",
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2013-11-12T17:48:41Z",
    "title_canon_sha256": "f8116ff5b6c702b71b9634532867bf2f4b559773df93fda3bd1281cd62901a18"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.2857",
    "kind": "arxiv",
    "version": 1
  }
}