Pith Number

pith:QM4ITKDK

pith:2015:QM4ITKDKJMJ7KS5AMW4SDE75OS

not attested not anchored not stored refs pending

What We Can Learn from the Running of the Spectral Index if no Tensors are Detected in the Cosmic Microwave Background Anisotropy

Alex Kehagias, Antonio Riotto, Matteo Biagetti

arxiv:1502.02289 v1 · 2015-02-08 · astro-ph.CO · gr-qc · hep-ph · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QM4ITKDKJMJ7KS5AMW4SDE75OS}

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	2026-05-18T01:59:37.577689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

833889a86a4b13f54ba065b92193fd7483708839f8114425ccc85062eaafbab8

Aliases

arxiv: 1502.02289 · arxiv_version: 1502.02289v1 · doi: 10.48550/arxiv.1502.02289 · pith_short_12: QM4ITKDKJMJ7 · pith_short_16: QM4ITKDKJMJ7KS5A · pith_short_8: QM4ITKDK

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/QM4ITKDKJMJ7KS5AMW4SDE75OS \
  | 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: 833889a86a4b13f54ba065b92193fd7483708839f8114425ccc85062eaafbab8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d108bf7dd036a2996f45d0a2188a1494c9bf9f335091a8ef3a8e6dc62b7ec2c",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-02-08T19:28:06Z",
    "title_canon_sha256": "1c6cf89446454b2ee9c06ed8c0aa9ee3a5b635db574e642b880ad9d2ab75c6fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.02289",
    "kind": "arxiv",
    "version": 1
  }
}