Pith Number

pith:FCFJ7Z55

pith:2019:FCFJ7Z55NQDW2WWGALVO7W5ALU

not attested not anchored not stored refs pending

Homogeneous surfaces admitting invariant connections

Carlos Alberto Mar\'in arango, David Bl\'azquez-Sanz, Luis Fernando Jim\'enez Buitrago

arxiv:1905.05349 v1 · 2019-05-14 · 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{FCFJ7Z55NQDW2WWGALVO7W5ALU}

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	2026-05-17T23:46:16.766031Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

288a9fe7bd6c076d5ac602eaefdba05d1ad6d294ef23559d48eff3dd09d4eb84

Aliases

arxiv: 1905.05349 · arxiv_version: 1905.05349v1 · doi: 10.48550/arxiv.1905.05349 · pith_short_12: FCFJ7Z55NQDW · pith_short_16: FCFJ7Z55NQDW2WWG · pith_short_8: FCFJ7Z55

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/FCFJ7Z55NQDW2WWGALVO7W5ALU \
  | 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: 288a9fe7bd6c076d5ac602eaefdba05d1ad6d294ef23559d48eff3dd09d4eb84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5da9bcd88d0155e35d0e341a76c7bcfb71d149478d255d28ddc39d274df3a2c5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2019-05-14T02:19:56Z",
    "title_canon_sha256": "0d3897bfb4101e249114915728bdf1c1aa3b89b317e85a9ddc9d7d233c1197f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.05349",
    "kind": "arxiv",
    "version": 1
  }
}