Pith Number

pith:XTUGP2QR

pith:2014:XTUGP2QRPK76GSTC5GHGC6WIKL

not attested not anchored not stored refs pending

On the topology of projective subspaces in complex Fermat varieties

Alex Degtyarev, Ichiro Shimada

arxiv:1405.4683 v3 · 2014-05-19 · 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{XTUGP2QRPK76GSTC5GHGC6WIKL}

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	2026-05-18T01:07:58.620188Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bce867ea117abfe34a62e98e617ac852e3fbbdac888498ae66f2289eefb44bd8

Aliases

arxiv: 1405.4683 · arxiv_version: 1405.4683v3 · doi: 10.48550/arxiv.1405.4683 · pith_short_12: XTUGP2QRPK76 · pith_short_16: XTUGP2QRPK76GSTC · pith_short_8: XTUGP2QR

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/XTUGP2QRPK76GSTC5GHGC6WIKL \
  | 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: bce867ea117abfe34a62e98e617ac852e3fbbdac888498ae66f2289eefb44bd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22e5f0d2d48fa4bc081e0e48f922dad1cdcb986ed71a72584d6bdf4d0f2511a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-05-19T11:38:04Z",
    "title_canon_sha256": "afbebf25c9ff37db51b38bab41357e0e126bc25f1b62c52657cd1d4bc21db549"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.4683",
    "kind": "arxiv",
    "version": 3
  }
}