Pith Number

pith:XACRMXVU

pith:1993:XACRMXVUKWDGNCQJEOK5REBPH4

not attested not anchored not stored refs pending

Gravitational Waves and the Polarisation of the Cosmic Microwave Background

A. G. Polnarev, P. Coles, R. A. Frewin

arxiv:astro-ph/9310045 v1 · 1993-10-26 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XACRMXVUKWDGNCQJEOK5REBPH4}

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	2026-05-18T01:12:44.291952Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b805165eb45586668a092395d8902f3f0eb2d4ac2f21c15e2b5a807702ef3a4f

Aliases

arxiv: astro-ph/9310045 · arxiv_version: astro-ph/9310045v1 · doi: 10.48550/arxiv.astro-ph/9310045 · pith_short_12: XACRMXVUKWDG · pith_short_16: XACRMXVUKWDGNCQJ · pith_short_8: XACRMXVU

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/XACRMXVUKWDGNCQJEOK5REBPH4 \
  | 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: b805165eb45586668a092395d8902f3f0eb2d4ac2f21c15e2b5a807702ef3a4f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1815481b01cf3c41fef24cb4abeec59da2613cd4343a0f2a0901790cb965cefc",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1993-10-26T22:09:00Z",
    "title_canon_sha256": "d432630c640e2d54e87d45384deef513dda90a791db231b4bfd874d3c47ff64f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9310045",
    "kind": "arxiv",
    "version": 1
  }
}