Pith Number

pith:64NYAMQN

pith:2026:64NYAMQNECU4N5YWZP4TKKMJ2U

not attested not anchored not stored refs pending

Causality alone bounds the maximum radius difference between different-mass neutron stars

Aleksi Kurkela, Tuhin Malik

arxiv:2606.25186 v1 · 2026-06-23 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{64NYAMQNECU4N5YWZP4TKKMJ2U}

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	2026-06-25T00:18:20.304978Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f71b80320d20a9c6f716cbf9352989d533dce1854ea2b25573f0e534a09078a6

Aliases

arxiv: 2606.25186 · arxiv_version: 2606.25186v1 · doi: 10.48550/arxiv.2606.25186 · pith_short_12: 64NYAMQNECU4 · pith_short_16: 64NYAMQNECU4N5YW · pith_short_8: 64NYAMQN

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/64NYAMQNECU4N5YWZP4TKKMJ2U \
  | 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: f71b80320d20a9c6f716cbf9352989d533dce1854ea2b25573f0e534a09078a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9015722290c8e85e8e437edc0057eacbb04963233456443c383d643b75c153bb",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-06-23T21:26:31Z",
    "title_canon_sha256": "8a740dfe3854d27a319fb6a3684c5553fd32c469bc470c30a519c1a3130470fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.25186",
    "kind": "arxiv",
    "version": 1
  }
}