Pith Number

pith:XFPZGAW7

pith:2018:XFPZGAW7YTA4I6WHFMQ4EKFT2S

not attested not anchored not stored refs pending

Extracting 21cm signal by frequency and angular filtering

Fengquan Wu, Qizhi Huang, Reza Ansari, Xuelei Chen

arxiv:1805.08265 v1 · 2018-05-21 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XFPZGAW7YTA4I6WHFMQ4EKFT2S}

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	2026-05-17T23:43:28.405951Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b95f9302dfc4c1c47ac72b21c228b3d48776f62b5bb3fe48f498a35b82f0cde3

Aliases

arxiv: 1805.08265 · arxiv_version: 1805.08265v1 · doi: 10.48550/arxiv.1805.08265 · pith_short_12: XFPZGAW7YTA4 · pith_short_16: XFPZGAW7YTA4I6WH · pith_short_8: XFPZGAW7

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/XFPZGAW7YTA4I6WHFMQ4EKFT2S \
  | 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: b95f9302dfc4c1c47ac72b21c228b3d48776f62b5bb3fe48f498a35b82f0cde3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "afcb98bd2443d37c87c6a0ef174ed3995b8ec29d89df39a7ea7b28fd39f5cc0a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2018-05-21T19:23:00Z",
    "title_canon_sha256": "9a147f9a35e3618546eb59f0d7b226fb4c3f500e6cbc373e5213e708e7ea6c2b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.08265",
    "kind": "arxiv",
    "version": 1
  }
}