Pith Number

pith:K2WMHUEK

pith:2019:K2WMHUEKTEHXRRRJ4MSVQYZ2LA

not attested not anchored not stored refs pending

Redshifted 21-cm emission signal from the halos in Dark Ages

B. Novosyadlyj, V. Shulga, W. Han, Yu. Kulinich

arxiv:1911.09407 v1 · 2019-11-21 · 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{K2WMHUEKTEHXRRRJ4MSVQYZ2LA}

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	2026-07-05T00:43:05.768693Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56acc3d08a990f78c629e32558633a5801a02cb5bf7e8e29e60939cf485b17e0

Aliases

arxiv: 1911.09407 · arxiv_version: 1911.09407v1 · doi: 10.48550/arxiv.1911.09407 · pith_short_12: K2WMHUEKTEHX · pith_short_16: K2WMHUEKTEHXRRRJ · pith_short_8: K2WMHUEK

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/K2WMHUEKTEHXRRRJ4MSVQYZ2LA \
  | 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: 56acc3d08a990f78c629e32558633a5801a02cb5bf7e8e29e60939cf485b17e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a499b5eb59cb901d7e1051543b3efce6fbd712032fec6ec2ccc8c4d14c8ce4c2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2019-11-21T11:07:11Z",
    "title_canon_sha256": "4d24c7f7aff5bad724fffd87bf8400488da4c053cd6f86aa34650af2307a505b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.09407",
    "kind": "arxiv",
    "version": 1
  }
}