Pith Number

pith:H5B75XQG

pith:2000:H5B75XQGU3IWNNF2P4VJJRMQGO

not attested not anchored not stored refs pending

The microwave background temperature at the redshift of 2.33771

Cedric Ledoux (ESO, Munich), Paris), Patrick Petitjean (IAP, Pune), R. Srianand (IUCAA

arxiv:astro-ph/0012222 v1 · 2000-12-11 · 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{H5B75XQGU3IWNNF2P4VJJRMQGO}

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	2026-05-18T01:18:34.362923Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f43fede06a6d166b4ba7f2a94c59033b240de9a4c405d4073d9fc63f9589d52

Aliases

arxiv: astro-ph/0012222 · arxiv_version: astro-ph/0012222v1 · doi: 10.48550/arxiv.astro-ph/0012222 · pith_short_12: H5B75XQGU3IW · pith_short_16: H5B75XQGU3IWNNF2 · pith_short_8: H5B75XQG

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/H5B75XQGU3IWNNF2P4VJJRMQGO \
  | 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: 3f43fede06a6d166b4ba7f2a94c59033b240de9a4c405d4073d9fc63f9589d52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "412d09bb32dac1d12fd80d3177341a2b60a6e5625a8363be0e9fbce86e160bbc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-12-11T11:14:19Z",
    "title_canon_sha256": "f35dc6e538413abfbca03ce8601a027c67af0c307bf6b4d428c7774f0b4d319a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0012222",
    "kind": "arxiv",
    "version": 1
  }
}