Pith Number

pith:I33QEU2V

pith:2012:I33QEU2VBKUP7IIFXB2QI2FNUN

not attested not anchored not stored refs pending

Cosmological Calculations on the GPU

Deborah Bard, Hasmik Yepremyan, Jan M. Kratochvil, Mark T. Allen, Matthew Bellis

arxiv:1208.3658 v2 · 2012-08-17 · astro-ph.IM · astro-ph.CO

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

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	2026-05-18T03:38:57.414891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46f70253550aa8ffa105b8750468ada35e660a668d7bc2402e125bef069fc7e5

Aliases

arxiv: 1208.3658 · arxiv_version: 1208.3658v2 · doi: 10.48550/arxiv.1208.3658 · pith_short_12: I33QEU2VBKUP · pith_short_16: I33QEU2VBKUP7IIF · pith_short_8: I33QEU2V

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/I33QEU2VBKUP7IIFXB2QI2FNUN \
  | 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: 46f70253550aa8ffa105b8750468ada35e660a668d7bc2402e125bef069fc7e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a36f046d1f2821aed43f836c1caeac3c07ebced03fe013796ce7307f5d92f150",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-08-17T18:59:54Z",
    "title_canon_sha256": "dddab34d93dd66a32d4866446474343a153b514b05d5182b100f0c2c483129b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.3658",
    "kind": "arxiv",
    "version": 2
  }
}