Pith Number

pith:HZ2FQ57Q

pith:2025:HZ2FQ57QUYUMWKRQXXKG22XHGB

not attested not anchored not stored refs pending

Neural-Network Chemical Emulator for First-Star Formation: Robust Iterative Predictions over a Wide Density Range

Kazuyuki Sugimura, Sojun Ono

arxiv:2508.16114 v2 · 2025-08-22 · astro-ph.GA · astro-ph.IM · astro-ph.SR · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HZ2FQ57QUYUMWKRQXXKG22XHGB}

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	2026-05-20T00:00:22.788157Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e745877f0a628cb2a30bdd46d6ae730758fd3975231fbfe7b360f59bcdc8fd1

Aliases

arxiv: 2508.16114 · arxiv_version: 2508.16114v2 · doi: 10.48550/arxiv.2508.16114 · pith_short_12: HZ2FQ57QUYUM · pith_short_16: HZ2FQ57QUYUMWKRQ · pith_short_8: HZ2FQ57Q

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/HZ2FQ57QUYUMWKRQXXKG22XHGB \
  | 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: 3e745877f0a628cb2a30bdd46d6ae730758fd3975231fbfe7b360f59bcdc8fd1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd1b4d5c2ee9e86ba01d74cbd0244a9b9c6dbad2e70f04677a45fc4011fee914",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "astro-ph.SR",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-08-22T06:11:03Z",
    "title_canon_sha256": "74aa63fe5500d6aa924dcd50e07180c7f3ba79656e743730593d893dbb4917af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.16114",
    "kind": "arxiv",
    "version": 2
  }
}