Pith Number

pith:IYORDQ7U

pith:2014:IYORDQ7U6JVHZU5J6MMECJYCVZ

not attested not anchored not stored refs pending

Erasing the variable: Empirical foreground discovery for global 21 cm spectrum experiments

Adrian Liu, Eric R. Switzer

arxiv:1404.7561 v3 · 2014-04-30 · 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{IYORDQ7U6JVHZU5J6MMECJYCVZ}

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	2026-05-18T02:40:56.056875Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

461d11c3f4f26a7cd3a9f318412702ae5ddf086fd9e1522db67fb418e1481d87

Aliases

arxiv: 1404.7561 · arxiv_version: 1404.7561v3 · doi: 10.48550/arxiv.1404.7561 · pith_short_12: IYORDQ7U6JVH · pith_short_16: IYORDQ7U6JVHZU5J · pith_short_8: IYORDQ7U

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/IYORDQ7U6JVHZU5J6MMECJYCVZ \
  | 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: 461d11c3f4f26a7cd3a9f318412702ae5ddf086fd9e1522db67fb418e1481d87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "745c1e8301b19985c2feae6904cc53a827acf1c385b3efc47244ce8e1fe93602",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2014-04-30T00:38:12Z",
    "title_canon_sha256": "b9f3a98f036b6cb6624bff52533afaf0d1dbcb2ed354149e7224009e107de2cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.7561",
    "kind": "arxiv",
    "version": 3
  }
}