Pith Number

pith:WVBRIXWL

pith:2009:WVBRIXWLDPD45U54WXGEI2YEMZ

not attested not anchored not stored refs pending

Hawking-like radiation as tunneling from the apparent horizon in a FRW Universe

Douglas Singleton, Ji-rong Ren, Tao Zhu

arxiv:0902.2542 v2 · 2009-02-15 · hep-th · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WVBRIXWLDPD45U54WXGEI2YEMZ}

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	2026-05-18T02:35:01.116566Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b543145ecb1bc7ced3bcb5cc446b046655972bc687c1391df2e06a1e2bf7a9dc

Aliases

arxiv: 0902.2542 · arxiv_version: 0902.2542v2 · doi: 10.48550/arxiv.0902.2542 · pith_short_12: WVBRIXWLDPD4 · pith_short_16: WVBRIXWLDPD45U54 · pith_short_8: WVBRIXWL

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/WVBRIXWLDPD45U54WXGEI2YEMZ \
  | 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: b543145ecb1bc7ced3bcb5cc446b046655972bc687c1391df2e06a1e2bf7a9dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b9c075cbdd0928e76dbbc622673abe97239b630fb6ad7fb566eca09a06e08165",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2009-02-15T13:00:18Z",
    "title_canon_sha256": "9916bb44faf3bc7fe38079adad9edbddf893cc5e1091c2691d8b7d0010d201c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.2542",
    "kind": "arxiv",
    "version": 2
  }
}