Pith Number

pith:IST6ESPB

pith:2017:IST6ESPBTZJMIQKYFGZCEWTDNP

not attested not anchored not stored refs pending

Quadric surface bundles over surfaces and stable rationality

Stefan Schreieder

arxiv:1706.01358 v4 · 2017-06-05 · 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{IST6ESPBTZJMIQKYFGZCEWTDNP}

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	2026-05-18T00:15:21.911491Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44a7e249e19e52c4415829b2225a636bef47ef11e893c122653488552aa8b231

Aliases

arxiv: 1706.01358 · arxiv_version: 1706.01358v4 · doi: 10.48550/arxiv.1706.01358 · pith_short_12: IST6ESPBTZJM · pith_short_16: IST6ESPBTZJMIQKY · pith_short_8: IST6ESPB

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/IST6ESPBTZJMIQKYFGZCEWTDNP \
  | 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: 44a7e249e19e52c4415829b2225a636bef47ef11e893c122653488552aa8b231

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7cc990ae3c640950ab7fba9bc6f88ef291709ca482aa9b0469867ab2e98ac33b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-06-05T14:52:58Z",
    "title_canon_sha256": "fc4347386b634992ec4be05f9576a424a63dd6bfee9f7fe2bc6908533b18e7e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.01358",
    "kind": "arxiv",
    "version": 4
  }
}