Pith Number

pith:C5NXJ4YU

pith:2015:C5NXJ4YUXHPLLW7JVJC3EGOJR5

not attested not anchored not stored refs pending

Some low-dimensional hypersurfaces that are not stably rational

Luca Tasin, Stefan Schreieder

arxiv:1510.02011 v4 · 2015-10-07 · 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{C5NXJ4YUXHPLLW7JVJC3EGOJR5}

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	2026-05-18T01:23:55.111563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

175b74f314b9deb5dbe9aa45b219c98f52cc25de00716930e401c0212ad36c34

Aliases

arxiv: 1510.02011 · arxiv_version: 1510.02011v4 · doi: 10.48550/arxiv.1510.02011 · pith_short_12: C5NXJ4YUXHPL · pith_short_16: C5NXJ4YUXHPLLW7J · pith_short_8: C5NXJ4YU

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/C5NXJ4YUXHPLLW7JVJC3EGOJR5 \
  | 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: 175b74f314b9deb5dbe9aa45b219c98f52cc25de00716930e401c0212ad36c34

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "246347f38e99651dbca7525dd8310d57e337fee4fc65908cfa0ebde0fdecb1ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-10-07T16:25:21Z",
    "title_canon_sha256": "9396156c322554729cf228dc45baf1258b5de5e0f6f53026310ab4008ae18ea0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.02011",
    "kind": "arxiv",
    "version": 4
  }
}