Pith Number

pith:SGQTCWEZ

pith:2015:SGQTCWEZ3LBNEU3JPYKKZWHJBZ

not attested not anchored not stored refs pending

Notes on diagonals of the product and symmetric variety of a surface

Luca Scala

arxiv:1510.04889 v2 · 2015-10-16 · 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{SGQTCWEZ3LBNEU3JPYKKZWHJBZ}

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	2026-05-18T01:27:31.107879Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

91a1315899dac2d253697e14acd8e90e51ebee35c1937473f2dd230d6deb3871

Aliases

arxiv: 1510.04889 · arxiv_version: 1510.04889v2 · doi: 10.48550/arxiv.1510.04889 · pith_short_12: SGQTCWEZ3LBN · pith_short_16: SGQTCWEZ3LBNEU3J · pith_short_8: SGQTCWEZ

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/SGQTCWEZ3LBNEU3JPYKKZWHJBZ \
  | 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: 91a1315899dac2d253697e14acd8e90e51ebee35c1937473f2dd230d6deb3871

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "09ac3ab0abb6718660e5e76f8ac0f17eacac860db472b79bcbad847dfe9623b6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-10-16T14:05:31Z",
    "title_canon_sha256": "d03bbd413d5e77176cb93467baa6780357c8feb25c2f9f292f8b19c2f9090149"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.04889",
    "kind": "arxiv",
    "version": 2
  }
}