Pith Number

pith:5IJUDQDM

pith:2015:5IJUDQDMOUWF3W3CY2I5R7UMCP

not attested not anchored not stored refs pending

Channel Estimation in Massive MIMO Systems

David Neumann, Michael Joham, Wolfgang Utschick

arxiv:1503.08691 v1 · 2015-03-30 · 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{5IJUDQDMOUWF3W3CY2I5R7UMCP}

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	2026-05-18T02:20:01.111100Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea1341c06c752c5ddb62c691d8fe8c13f6bf50ee8f17541313d6e8f3381d371e

Aliases

arxiv: 1503.08691 · arxiv_version: 1503.08691v1 · doi: 10.48550/arxiv.1503.08691 · pith_short_12: 5IJUDQDMOUWF · pith_short_16: 5IJUDQDMOUWF3W3C · pith_short_8: 5IJUDQDM

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/5IJUDQDMOUWF3W3CY2I5R7UMCP \
  | 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: ea1341c06c752c5ddb62c691d8fe8c13f6bf50ee8f17541313d6e8f3381d371e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0523a4dad9d3d96993efc29ffe170d9fedc159f2557540dedf4cecd68ddf17ac",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-03-30T14:45:09Z",
    "title_canon_sha256": "c03005fa2a9e5c697b1e6f1aab336ab2f5570422a8c1543d1d98cdd64b2ceecf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.08691",
    "kind": "arxiv",
    "version": 1
  }
}