Pith Number

pith:TPFAJ45I

pith:2021:TPFAJ45IWIRDZFOQCG2JK4SG7H

not attested not anchored not stored refs pending

Redshift Evolution of the H2/HI Mass Ratio In Galaxies

Alvio Renzini, Andrea Enia, Giulia Rodighiero, Laura Morselli

arxiv:2101.10372 v1 · 2021-01-25 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TPFAJ45IWIRDZFOQCG2JK4SG7H}

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	2026-07-05T02:09:28.066371Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9bca04f3a8b2223c95d011b4957246f9f218bc72d59b64f2ac35fef2c29edcd4

Aliases

arxiv: 2101.10372 · arxiv_version: 2101.10372v1 · doi: 10.48550/arxiv.2101.10372 · pith_short_12: TPFAJ45IWIRD · pith_short_16: TPFAJ45IWIRDZFOQ · pith_short_8: TPFAJ45I

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/TPFAJ45IWIRDZFOQCG2JK4SG7H \
  | 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: 9bca04f3a8b2223c95d011b4957246f9f218bc72d59b64f2ac35fef2c29edcd4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6892c7338a44832c8a66216bc8c1c0fc961a2db8713d40232f452c33aac9c727",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-01-25T19:42:31Z",
    "title_canon_sha256": "6dfc07e11fc0bf49ebdb0340f54db55cc4aebb7dfed8cbd858e0cd2393731676"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.10372",
    "kind": "arxiv",
    "version": 1
  }
}