Pith Number

pith:H2GEZQB4

pith:2016:H2GEZQB4UQSZXEZBEGZJB7VIDR

not attested not anchored not stored refs pending

Surfaces of Co-dimension Two Pinched by Normal Curvature

Charles Baker, Huy The Nguyen

arxiv:1605.06200 v1 · 2016-05-20 · 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{H2GEZQB4UQSZXEZBEGZJB7VIDR}

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	2026-05-18T01:14:19.621484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e8c4cc03ca4259b932121b290fea81c71ade9b8bb8ca5277f172ed8408f6682

Aliases

arxiv: 1605.06200 · arxiv_version: 1605.06200v1 · doi: 10.48550/arxiv.1605.06200 · pith_short_12: H2GEZQB4UQSZ · pith_short_16: H2GEZQB4UQSZXEZB · pith_short_8: H2GEZQB4

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/H2GEZQB4UQSZXEZBEGZJB7VIDR \
  | 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: 3e8c4cc03ca4259b932121b290fea81c71ade9b8bb8ca5277f172ed8408f6682

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fe7169b64f6b39b8ed0f9ac9cc16beff7afd43053f2a7a6e295357c98802bbc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-05-20T02:52:52Z",
    "title_canon_sha256": "bf9148a3fe00a9c64fbc986c4fa507b7437d6ff534a01256a544801bf0ddd1a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.06200",
    "kind": "arxiv",
    "version": 1
  }
}