Pith Number

pith:QGVBRECA

pith:2012:QGVBRECARD4NWIUEJRBFEPUYWP

not attested not anchored not stored refs pending

Quasi-Orthogonal Space-Time-Frequency Trellis Codes for MIMO-OFDM Systems

J. Robinson Ebi Elias, R. Rajesh

arxiv:1207.0018 v1 · 2012-06-12 · 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{QGVBRECARD4NWIUEJRBFEPUYWP}

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	2026-05-18T03:52:00.526520Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81aa18904088f8db22844c42523e98b3d93b8424b5a6bfa5addb0f97000528ec

Aliases

arxiv: 1207.0018 · arxiv_version: 1207.0018v1 · doi: 10.48550/arxiv.1207.0018 · pith_short_12: QGVBRECARD4N · pith_short_16: QGVBRECARD4NWIUE · pith_short_8: QGVBRECA

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/QGVBRECARD4NWIUEJRBFEPUYWP \
  | 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: 81aa18904088f8db22844c42523e98b3d93b8424b5a6bfa5addb0f97000528ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "902fb7828ce914deb6aba12614224b38495ba904175a0196e35f8ae5f0c65079",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-06-12T11:47:43Z",
    "title_canon_sha256": "0b7aabafec5b3a503ef063fff6ef64a0338436e9f3b72709ea27eacdeaecb61e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.0018",
    "kind": "arxiv",
    "version": 1
  }
}