Pith Number

pith:NULSEM3J

pith:2019:NULSEM3JUGHC2FYGQZ7TLLY4KG

not attested not anchored not stored refs pending

The polarization of the binary system Spica, and the reflection of light from stars

Ain De Horta, Daniel. V. Cotton, Darren Maybour, Jeremy Bailey, Lucyna Kedziora-Chudczer

arxiv:1904.01195 v1 · 2019-04-02 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NULSEM3JUGHC2FYGQZ7TLLY4KG}

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	2026-05-17T23:49:35.596152Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d17223369a18e2d1706867f35af1c51968334a91e234014a71f3f9654ce5365

Aliases

arxiv: 1904.01195 · arxiv_version: 1904.01195v1 · doi: 10.48550/arxiv.1904.01195 · pith_short_12: NULSEM3JUGHC · pith_short_16: NULSEM3JUGHC2FYG · pith_short_8: NULSEM3J

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/NULSEM3JUGHC2FYGQZ7TLLY4KG \
  | 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: 6d17223369a18e2d1706867f35af1c51968334a91e234014a71f3f9654ce5365

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e12ada5e6aaf3a3ecb307ffee3e28be17bbf7687be531d22bdf2af57f9f21094",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-04-02T03:34:38Z",
    "title_canon_sha256": "8c0e08262dd181c4b41469c3cbd6fc0d41b080161c07705a4f9a7338b5605b08"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.01195",
    "kind": "arxiv",
    "version": 1
  }
}