Pith Number

pith:OPWLABMQ

pith:2018:OPWLABMQQVBYOISBDVXODX2VR2

not attested not anchored not stored refs pending

Hierarchical Sparse Channel Estimation for Massive MIMO

Axel Flinth, Gerhard Wunder, Gitta Kutyniok, Giuseppe Caire, Ingo Roth, Mahdi Barzegar, Saeid Haghighatshoar

arxiv:1803.10994 v1 · 2018-03-29 · cs.IT · math.IT

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

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	2026-05-18T00:19:49.594645Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73ecb0059085438722411d6ee1df558e8164dfbe66362aa2f66fe154f4947410

Aliases

arxiv: 1803.10994 · arxiv_version: 1803.10994v1 · doi: 10.48550/arxiv.1803.10994 · pith_short_12: OPWLABMQQVBY · pith_short_16: OPWLABMQQVBYOISB · pith_short_8: OPWLABMQ

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/OPWLABMQQVBYOISBDVXODX2VR2 \
  | 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: 73ecb0059085438722411d6ee1df558e8164dfbe66362aa2f66fe154f4947410

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "007809dd7f0c5b3ad87371fe33522383b6074ff2af91ac357fc729e1138f5691",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2018-03-29T10:02:02Z",
    "title_canon_sha256": "a9f3e7125049254d4ebf651f28fde38f91ec1b0964fc94cd9f19ddd5b5e5379b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.10994",
    "kind": "arxiv",
    "version": 1
  }
}