Pith Number

pith:KBFMSRPB

pith:1994:KBFMSRPB4JM5ZBB77DYAXRL6VW

not attested not anchored not stored refs pending

Limits on the global Hubble constant and the age of the universe

T. Suginohara, Y. Inagaki, Y. Suto

arxiv:astro-ph/9412090 v1 · 1994-12-26 · 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{KBFMSRPB4JM5ZBB77DYAXRL6VW}

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	2026-05-18T00:51:38.300717Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

504ac945e1e259dc843ff8f00bc57ead91eadf43eff3ff09e403a297d6650b1e

Aliases

arxiv: astro-ph/9412090 · arxiv_version: astro-ph/9412090v1 · doi: 10.48550/arxiv.astro-ph/9412090 · pith_short_12: KBFMSRPB4JM5 · pith_short_16: KBFMSRPB4JM5ZBB7 · pith_short_8: KBFMSRPB

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/KBFMSRPB4JM5ZBB77DYAXRL6VW \
  | 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: 504ac945e1e259dc843ff8f00bc57ead91eadf43eff3ff09e403a297d6650b1e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48fcb94ba5fd86899439700f3f21eb3655b23ea223a988828d82f34cc6563ae5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1994-12-26T03:04:31Z",
    "title_canon_sha256": "c2e51d7fde5f3edef03d676b3db1520a775b2847bc9fe2ecfc51cfd99ebec827"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9412090",
    "kind": "arxiv",
    "version": 1
  }
}