Pith Number

pith:XCFMVWVI

pith:2020:XCFMVWVIOJISJITGWQMGRBY4IE

not attested not anchored not stored refs pending

The evolution of neutral hydrogen over the past 11 Gyr via HI 21 cm absorption

Adam K. Leroy, Alberto D. Bolatto, Jeremy Darling, Kathryn Grasha

arxiv:2008.07578 v1 · 2020-08-17 · 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{XCFMVWVIOJISJITGWQMGRBY4IE}

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	2026-07-05T01:29:14.788348Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b88acadaa8725124a266b41868871c412fd774a0c012749e80ff672aab26216d

Aliases

arxiv: 2008.07578 · arxiv_version: 2008.07578v1 · doi: 10.48550/arxiv.2008.07578 · pith_short_12: XCFMVWVIOJIS · pith_short_16: XCFMVWVIOJISJITG · pith_short_8: XCFMVWVI

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/XCFMVWVIOJISJITGWQMGRBY4IE \
  | 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: b88acadaa8725124a266b41868871c412fd774a0c012749e80ff672aab26216d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "628f66d86624010f6e442a0c7ed05dbfdcbf788f9d2618da0203a4732bf96525",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-08-17T19:07:39Z",
    "title_canon_sha256": "098275fbf00f7ba1fe939010ef503b5fc1548b6e532343bac193bd750c0cebd0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.07578",
    "kind": "arxiv",
    "version": 1
  }
}