Pith Number

pith:OLH3BZIP

pith:2012:OLH3BZIPFEUBEWNHVHCTVTRFEK

not attested not anchored not stored refs pending

Expander-like Codes based on Finite Projective Geometry

B. S. Adiga, Hrishikesh Sharma, Sachin Patkar, Swadesh Choudhary

arxiv:1209.3460 v1 · 2012-09-16 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OLH3BZIPFEUBEWNHVHCTVTRFEK}

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	2026-05-18T03:45:30.925159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72cfb0e50f29281259a7a9c53ace25229195a355ef83d9d99818febbc7c3a75d

Aliases

arxiv: 1209.3460 · arxiv_version: 1209.3460v1 · doi: 10.48550/arxiv.1209.3460 · pith_short_12: OLH3BZIPFEUB · pith_short_16: OLH3BZIPFEUBEWNH · pith_short_8: OLH3BZIP

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/OLH3BZIPFEUBEWNHVHCTVTRFEK \
  | 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: 72cfb0e50f29281259a7a9c53ace25229195a355ef83d9d99818febbc7c3a75d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fcf0e3fc2ea19c51e2127a70aedd3af7f8c3d68ca8ac25760199f0b178797a3c",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-09-16T04:41:22Z",
    "title_canon_sha256": "f0a452bfe9b1183e73a8550d343ca96790fbc847282e53b795e3a095f0978421"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.3460",
    "kind": "arxiv",
    "version": 1
  }
}