Pith Number

pith:SWPBTC5V

pith:2015:SWPBTC5VJMAJE5RD27RS524GZU

not attested not anchored not stored refs pending

Geometry of genus 8 Nikulin surfaces and rationality of their moduli

Alessandro Verra

arxiv:1509.03364 v1 · 2015-09-10 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SWPBTC5VJMAJE5RD27RS524GZU}

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	2026-05-18T01:33:23.499802Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

959e198bb54b00927623d7e32eeb86cd123447da2362ec22699a66764a8fc970

Aliases

arxiv: 1509.03364 · arxiv_version: 1509.03364v1 · doi: 10.48550/arxiv.1509.03364 · pith_short_12: SWPBTC5VJMAJ · pith_short_16: SWPBTC5VJMAJE5RD · pith_short_8: SWPBTC5V

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/SWPBTC5VJMAJE5RD27RS524GZU \
  | 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: 959e198bb54b00927623d7e32eeb86cd123447da2362ec22699a66764a8fc970

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e4635aa16c3ad94475ec0bbd951f190dd91cc11372a8531e6db5b080ccd7fde",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-09-10T23:30:43Z",
    "title_canon_sha256": "5e50f4450e48ba9b2de7c0730b4e409e869fa214fc1c2165549afbccd1ce06ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.03364",
    "kind": "arxiv",
    "version": 1
  }
}