Pith Number

pith:YQLZYBL4

pith:2012:YQLZYBL4LJLV7CFIF3QX3TXEYS

not attested not anchored not stored refs pending

Improved Perfect Space-Time Block Codes

B. Sundar Rajan, K. Pavan Srinath

arxiv:1208.1592 v2 · 2012-08-08 · 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{YQLZYBL4LJLV7CFIF3QX3TXEYS}

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	2026-05-18T03:38:45.984080Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c4179c057c5a575f88a82ee17dcee4c493d3926a35e3a7bacdde29f01bc2f835

Aliases

arxiv: 1208.1592 · arxiv_version: 1208.1592v2 · doi: 10.48550/arxiv.1208.1592 · pith_short_12: YQLZYBL4LJLV · pith_short_16: YQLZYBL4LJLV7CFI · pith_short_8: YQLZYBL4

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/YQLZYBL4LJLV7CFIF3QX3TXEYS \
  | 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: c4179c057c5a575f88a82ee17dcee4c493d3926a35e3a7bacdde29f01bc2f835

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "689096022a9338dc58c4969565e0e9410a68f213f29a0d939fa8fef8ae02710a",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-08-08T06:16:31Z",
    "title_canon_sha256": "1b1c9638062166f9838f75cf3f83cff580edec4001c65b4e9d1c25373898faca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.1592",
    "kind": "arxiv",
    "version": 2
  }
}