Pith Number

pith:TH6YIX6Z

pith:2018:TH6YIX6ZOB6BWWX4W6ZRBXF3BV

not attested not anchored not stored refs pending

The absence of a thin disc in M81

A. J. Young, D. Emmanoulopoulos, I. McHardy, S. Connolly

arxiv:1803.10050 v1 · 2018-03-27 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TH6YIX6ZOB6BWWX4W6ZRBXF3BV}

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	2026-05-18T00:19:20.052233Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

99fd845fd9707c1b5afcb7b310dcbb0d793bbe0e2162c4cd98a3344351ddbbc8

Aliases

arxiv: 1803.10050 · arxiv_version: 1803.10050v1 · doi: 10.48550/arxiv.1803.10050 · pith_short_12: TH6YIX6ZOB6B · pith_short_16: TH6YIX6ZOB6BWWX4 · pith_short_8: TH6YIX6Z

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/TH6YIX6ZOB6BWWX4W6ZRBXF3BV \
  | 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: 99fd845fd9707c1b5afcb7b310dcbb0d793bbe0e2162c4cd98a3344351ddbbc8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4fe02b20375a61d909eda57d8b16d5da150372c0ae62296c116b1d752e36f426",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-03-27T12:54:28Z",
    "title_canon_sha256": "f5837bb9d076143c794dd05e2e989e6660b26a785d25f26808f8065b7f8cdd57"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.10050",
    "kind": "arxiv",
    "version": 1
  }
}