Pith Number

pith:JS5BUPUT

pith:2026:JS5BUPUT2GEZHOSD5SPTDHZH24

not attested not anchored not stored refs pending

Black holes in a bouncing universe

Daniela P\'erez, Florencia L. Vieyro, Iara Pintos

arxiv:2606.30818 v1 · 2026-06-29 · gr-qc · 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{JS5BUPUT2GEZHOSD5SPTDHZH24}

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	2026-07-01T00:17:18.398400Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4cba1a3e93d18993ba43ec9f319f27d7026b306e298ad5889a87f4e217f03b5b

Aliases

arxiv: 2606.30818 · arxiv_version: 2606.30818v1 · doi: 10.48550/arxiv.2606.30818 · pith_short_12: JS5BUPUT2GEZ · pith_short_16: JS5BUPUT2GEZHOSD · pith_short_8: JS5BUPUT

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/JS5BUPUT2GEZHOSD5SPTDHZH24 \
  | 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: 4cba1a3e93d18993ba43ec9f319f27d7026b306e298ad5889a87f4e217f03b5b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b85eb7738a8d11d0b77e3e0aa4e8f270d88dbffb0e947a678ec736adf00a1dbe",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2026-06-29T18:45:06Z",
    "title_canon_sha256": "e7a4a1497115d1cbba7bbffcb11a900e0d6dc83ae35e88596f023cc00cc639e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.30818",
    "kind": "arxiv",
    "version": 1
  }
}