Pith Number

pith:NHQN4YVR

pith:2026:NHQN4YVRGENQHPMYFXH4MKSZRA

not attested not anchored not stored refs pending

Isomorphism classes of multi Danielewski varieties

Polina Evdokimova

arxiv:2607.12639 v1 · 2026-07-14 · 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{NHQN4YVRGENQHPMYFXH4MKSZRA}

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	2026-07-15T01:22:08.309891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69e0de62b1311b03bd982dcfc62a5988016a490ce5d750c45aadcb01afd88ff1

Aliases

arxiv: 2607.12639 · arxiv_version: 2607.12639v1 · doi: 10.48550/arxiv.2607.12639 · pith_short_12: NHQN4YVRGENQ · pith_short_16: NHQN4YVRGENQHPMY · pith_short_8: NHQN4YVR

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/NHQN4YVRGENQHPMYFXH4MKSZRA \
  | 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: 69e0de62b1311b03bd982dcfc62a5988016a490ce5d750c45aadcb01afd88ff1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00b147646ac3b3b2aa92d34369aadfc6955c512748a200d14c64623ab3fc8c77",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2026-07-14T11:16:38Z",
    "title_canon_sha256": "f323b0ee8927685c428757622fc8abb51dca3747bf136c580811c9edf994c271"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.12639",
    "kind": "arxiv",
    "version": 1
  }
}