Pith Number

pith:HM62LGQQ

pith:2019:HM62LGQQHCTDC5V3VZWEHKGGAN

not attested not anchored not stored refs pending

Spherical orthotomic curve-germs

Takashi Nishimura, Xihe Liu

arxiv:1901.04150 v1 · 2019-01-14 · math.GT · 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{HM62LGQQHCTDC5V3VZWEHKGGAN}

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	2026-05-17T23:56:26.207481Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b3da59a1038a63176bbae6c43a8c603662358d7ded4b1e858bc307b1374e10f

Aliases

arxiv: 1901.04150 · arxiv_version: 1901.04150v1 · doi: 10.48550/arxiv.1901.04150 · pith_short_12: HM62LGQQHCTD · pith_short_16: HM62LGQQHCTDC5V3 · pith_short_8: HM62LGQQ

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/HM62LGQQHCTDC5V3VZWEHKGGAN \
  | 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: 3b3da59a1038a63176bbae6c43a8c603662358d7ded4b1e858bc307b1374e10f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f315f6766a06fae5b6009fff10ef1089fcdaeb733b589ae658b2c5540e1bc68",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2019-01-14T06:46:42Z",
    "title_canon_sha256": "d9be8c57a60508a221a2e0473bf7157860261c195edcee4e08883b6cce77cb05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.04150",
    "kind": "arxiv",
    "version": 1
  }
}