Pith Number

pith:EWI55NJ4

pith:2019:EWI55NJ4FQWY2QFFJQQV2LOBIX

not attested not anchored not stored refs pending

FDD Massive MIMO Based on Efficient Downlink Channel Reconstruction

Chao-Kai Wen, Kai-Kit Wong, Qi Liu, Shi Jin, Yu Han

arxiv:1902.06174 v1 · 2019-02-16 · 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{EWI55NJ4FQWY2QFFJQQV2LOBIX}

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	2026-05-17T23:53:46.345551Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2591deb53c2c2d8d40a54c215d2dc145ec3d61c4be2703ed7255a4d80fe2f140

Aliases

arxiv: 1902.06174 · arxiv_version: 1902.06174v1 · doi: 10.48550/arxiv.1902.06174 · pith_short_12: EWI55NJ4FQWY · pith_short_16: EWI55NJ4FQWY2QFF · pith_short_8: EWI55NJ4

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/EWI55NJ4FQWY2QFFJQQV2LOBIX \
  | 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: 2591deb53c2c2d8d40a54c215d2dc145ec3d61c4be2703ed7255a4d80fe2f140

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb7eae0eff0a736a67b7e6481a215c3a2619d83d1db87d3347e434356f3ab2e3",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2019-02-16T23:03:20Z",
    "title_canon_sha256": "42e00d2ad44c05f09dc8d93556a28b6b2569eee884296be7437a60f3c30bafdd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06174",
    "kind": "arxiv",
    "version": 1
  }
}