Pith Number

pith:D2B2Q4BR

pith:2014:D2B2Q4BRTPE4RD6RPM4ITUW7GU

not attested not anchored not stored refs pending

A Review of Alexander Isaev's Spherical Tube Hypersurfaces

Thomas Garrity

arxiv:1401.2639 v2 · 2014-01-12 · math.DG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D2B2Q4BRTPE4RD6RPM4ITUW7GU}

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	2026-05-18T02:40:02.088075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e83a870319bc9c88fd17b3889d2df3525894853fb44be7a94936861f07b5c02

Aliases

arxiv: 1401.2639 · arxiv_version: 1401.2639v2 · doi: 10.48550/arxiv.1401.2639 · pith_short_12: D2B2Q4BRTPE4 · pith_short_16: D2B2Q4BRTPE4RD6R · pith_short_8: D2B2Q4BR

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/D2B2Q4BRTPE4RD6RPM4ITUW7GU \
  | 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: 1e83a870319bc9c88fd17b3889d2df3525894853fb44be7a94936861f07b5c02

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e9b63aedc2b391511b15cf358402b1a0a916bb8ab17d91e3cd29f4aad78cdddc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2014-01-12T16:36:20Z",
    "title_canon_sha256": "204e146960c1d19f096fe40e10d7f5ad52ca3f326dcb20cd2baa537517ea5a64"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.2639",
    "kind": "arxiv",
    "version": 2
  }
}