Pith Number

pith:LJ2WXV3F

pith:2018:LJ2WXV3FZY2CCBTK3KVEGRTWOR

not attested not anchored not stored refs pending

21cm Signal Recovery via the Robust Principle Component Analysis

Reza Ansari, Shifan Zuo, Xuelei Chen, Youjun Lu

arxiv:1801.04082 v1 · 2018-01-12 · 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{LJ2WXV3FZY2CCBTK3KVEGRTWOR}

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	2026-05-17T23:43:28.563610Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5a756bd765ce3421066adaaa434676746a688b09a029319bfa0c695f02b3a1a6

Aliases

arxiv: 1801.04082 · arxiv_version: 1801.04082v1 · doi: 10.48550/arxiv.1801.04082 · pith_short_12: LJ2WXV3FZY2C · pith_short_16: LJ2WXV3FZY2CCBTK · pith_short_8: LJ2WXV3F

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/LJ2WXV3FZY2CCBTK3KVEGRTWOR \
  | 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: 5a756bd765ce3421066adaaa434676746a688b09a029319bfa0c695f02b3a1a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2513b5bd280730dfe77328ce08eda0bdf433f5d2f430132081164328e40df6ce",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2018-01-12T08:11:03Z",
    "title_canon_sha256": "8feb3b9a384120362890e1c1b719fb5bb46bd205627c3b85d911e94abbb0254a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.04082",
    "kind": "arxiv",
    "version": 1
  }
}