Pith Number

pith:PY4RXGEL

pith:2017:PY4RXGELAPD3ENKEDT2ULNFY45

not attested not anchored not stored refs pending

Channel Estimation for TDD/FDD Massive MIMO Systems with Channel Covariance Computing

Feifei Gao, Hongxiang Xie, Jun Fang, Shi Jin, Ying-Chang Liang

arxiv:1710.00704 v1 · 2017-10-02 · 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{PY4RXGELAPD3ENKEDT2ULNFY45}

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	2026-05-18T00:33:53.976176Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e391b988b03c7b235441cf545b4b8e761ab9f4516237022e06f866234322d74

Aliases

arxiv: 1710.00704 · arxiv_version: 1710.00704v1 · doi: 10.48550/arxiv.1710.00704 · pith_short_12: PY4RXGELAPD3 · pith_short_16: PY4RXGELAPD3ENKE · pith_short_8: PY4RXGEL

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/PY4RXGELAPD3ENKEDT2ULNFY45 \
  | 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: 7e391b988b03c7b235441cf545b4b8e761ab9f4516237022e06f866234322d74

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "686ce7d2b6d93f5b8187471b64e3696f287e966a5102f6281e80f8acfe8f865b",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2017-10-02T14:55:31Z",
    "title_canon_sha256": "8edd959f72d633cc24b6b0c16c156c386c29970fedd1c8580d17cf075f0b7d7d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.00704",
    "kind": "arxiv",
    "version": 1
  }
}