Pith Number

pith:KO7KH3W6

pith:2017:KO7KH3W6UGH7KNVAWP2VDY4RSJ

not attested not anchored not stored refs pending

Quadrics and Scherk towers

Kotaro Yamada, Masaaki Umehara, Masatoshi Kokubu, Shoichi Fujimori, Udo Hertrich-Jeromin

arxiv:1701.02134 v1 · 2017-01-09 · 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{KO7KH3W6UGH7KNVAWP2VDY4RSJ}

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	2026-05-18T00:53:11.585501Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53bea3eedea18ff536a0b3f551e391926ea5326288f0d08dcf136c4f2c2a612c

Aliases

arxiv: 1701.02134 · arxiv_version: 1701.02134v1 · doi: 10.48550/arxiv.1701.02134 · pith_short_12: KO7KH3W6UGH7 · pith_short_16: KO7KH3W6UGH7KNVA · pith_short_8: KO7KH3W6

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/KO7KH3W6UGH7KNVAWP2VDY4RSJ \
  | 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: 53bea3eedea18ff536a0b3f551e391926ea5326288f0d08dcf136c4f2c2a612c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de6b62b803cf8302ba761b2b0a86d4d2f583c4882ab3058bc763ac003d8b767e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2017-01-09T11:09:07Z",
    "title_canon_sha256": "91ac5018adaae6e2da967643760221e748b85b083a80ed1d7031d045ccbbd612"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.02134",
    "kind": "arxiv",
    "version": 1
  }
}