Pith Number

pith:4H56A2FG

pith:2019:4H56A2FGNTK7L3PBCUETOLLATS

not attested not anchored not stored refs pending

A Block Sparsity Based Estimator for mmWave Massive MIMO Channels with Beam Squint

Feifei Gao, Mark F. Flanagan, Mingjin Wang, Nir Shlezinger, Yonina C. Eldar

arxiv:1904.12272 v1 · 2019-04-28 · eess.SP · 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{4H56A2FGNTK7L3PBCUETOLLATS}

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	2026-07-05T00:41:26.752025Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1fbe068a66cd5f5ede11509372d609cbc66836b3fa95735e22f033cc72c59aa

Aliases

arxiv: 1904.12272 · arxiv_version: 1904.12272v1 · doi: 10.48550/arxiv.1904.12272 · pith_short_12: 4H56A2FGNTK7 · pith_short_16: 4H56A2FGNTK7L3PB · pith_short_8: 4H56A2FG

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/4H56A2FGNTK7L3PBCUETOLLATS \
  | 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: e1fbe068a66cd5f5ede11509372d609cbc66836b3fa95735e22f033cc72c59aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02b42e9834140bd9570185caebef040d97f1b9136de492fd026afe355ffff101",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2019-04-28T07:56:20Z",
    "title_canon_sha256": "befdc15163d51e29ec53734bab381857e0115d89bade95394c3ae555128a5c3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.12272",
    "kind": "arxiv",
    "version": 1
  }
}