Pith Number

pith:VGL2K3AL

pith:2019:VGL2K3AL7R3WKQ2TET76IHVCT2

not attested not anchored not stored refs pending

Constraining First Star Formation with 21cm-Cosmology

Anna T. P. Schauer, Boyuan Liu, Volker Bromm

arxiv:1901.03344 v3 · 2019-01-10 · astro-ph.GA · 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{VGL2K3AL7R3WKQ2TET76IHVCT2}

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	2026-05-17T23:44:57.828184Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a997a56c0bfc7765435324ffe41ea29ebde47afd2355c572750e521fbd094f28

Aliases

arxiv: 1901.03344 · arxiv_version: 1901.03344v3 · doi: 10.48550/arxiv.1901.03344 · pith_short_12: VGL2K3AL7R3W · pith_short_16: VGL2K3AL7R3WKQ2T · pith_short_8: VGL2K3AL

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/VGL2K3AL7R3WKQ2TET76IHVCT2 \
  | 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: a997a56c0bfc7765435324ffe41ea29ebde47afd2355c572750e521fbd094f28

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "deede7d2f593e06902e97f5fc06fcb1441adba2d6c0e89c861ec7e40d7ed2561",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-01-10T19:00:10Z",
    "title_canon_sha256": "5cf46325d0c2eca27c208d184b4c12741702f8d5fcf31e5ab1033475925f8cad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.03344",
    "kind": "arxiv",
    "version": 3
  }
}