Pith Number

pith:HAL335TJ

pith:1997:HAL335TJ2WWHNQ4HZ74DZA3VMU

not attested not anchored not stored refs pending

Getting Around Cosmic Variance

Abraham Loeb, Marc Kamionkowski

arxiv:astro-ph/9703118 v1 · 1997-03-18 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HAL335TJ2WWHNQ4HZ74DZA3VMU}

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	2026-05-18T01:08:08.176691Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3817bdf669d5ac76c387cff83c8375650d5682269314dfac6e2b9a640e50a89b

Aliases

arxiv: astro-ph/9703118 · arxiv_version: astro-ph/9703118v1 · doi: 10.48550/arxiv.astro-ph/9703118 · pith_short_12: HAL335TJ2WWH · pith_short_16: HAL335TJ2WWHNQ4H · pith_short_8: HAL335TJ

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/HAL335TJ2WWHNQ4HZ74DZA3VMU \
  | 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: 3817bdf669d5ac76c387cff83c8375650d5682269314dfac6e2b9a640e50a89b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a2273c864f5d5c99256ed32e7032301d2b87ddeeacd9c48dc6ecb7a48021d45",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-03-18T18:27:20Z",
    "title_canon_sha256": "246254e6d99be6fac2becbe1eac69ee6f7f07ad987dd33671977b498ddf33b02"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9703118",
    "kind": "arxiv",
    "version": 1
  }
}