Pith Number

pith:BPOKYWOB

pith:2009:BPOKYWOB2GHVO3SPWBHPT3AKX4

not attested not anchored not stored refs pending

Projected Constraints on Modified Gravity Cosmologies from 21 cm Intensity Mapping

Fabian Schmidt, Kiyoshi Wesley Masui, Patrick McDonald, Ue-Li Pen

arxiv:0911.3552 v2 · 2009-11-18 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BPOKYWOB2GHVO3SPWBHPT3AKX4}

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	2026-07-04T17:25:06.856436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0bdcac59c1d18f576e4fb04ef9ec0abf2189d7de8d2698c53766b7d4b725c706

Aliases

arxiv: 0911.3552 · arxiv_version: 0911.3552v2 · doi: 10.48550/arxiv.0911.3552 · pith_short_12: BPOKYWOB2GHV · pith_short_16: BPOKYWOB2GHVO3SP · pith_short_8: BPOKYWOB

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/BPOKYWOB2GHVO3SPWBHPT3AKX4 \
  | 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: 0bdcac59c1d18f576e4fb04ef9ec0abf2189d7de8d2698c53766b7d4b725c706

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40e3e9ce3cd138ef0b8e4d9eff4dddf5b38b63c8f91d1b159b96f669e9a170b7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-18T14:29:17Z",
    "title_canon_sha256": "f1ae38a878441aa981fe885b90b76b6fbfda9adc5ca3cf7d01b1ca01b06e4acc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.3552",
    "kind": "arxiv",
    "version": 2
  }
}