Pith Number

pith:RMMAW3WP

pith:2016:RMMAW3WP5EKCCMQDAZRWMETCDW

not attested not anchored not stored refs pending

A construction method for discrete constant negative Gaussian curvature surfaces

Shimpei Kobayashi

arxiv:1604.02772 v1 · 2016-04-11 · 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{RMMAW3WP5EKCCMQDAZRWMETCDW}

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	2026-05-18T01:17:22.205171Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8b180b6ecfe91421320306636612621db4ca26969666c44db235efc8eb0ee35f

Aliases

arxiv: 1604.02772 · arxiv_version: 1604.02772v1 · doi: 10.48550/arxiv.1604.02772 · pith_short_12: RMMAW3WP5EKC · pith_short_16: RMMAW3WP5EKCCMQD · pith_short_8: RMMAW3WP

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/RMMAW3WP5EKCCMQDAZRWMETCDW \
  | 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: 8b180b6ecfe91421320306636612621db4ca26969666c44db235efc8eb0ee35f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1e460519229834082243668892e0e8a12584fc54068f80bb950895da8de9303",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-04-11T01:32:17Z",
    "title_canon_sha256": "71445e6858eb3ad71a1d71d8390322469803069cdce8e303b226c74fac2af283"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.02772",
    "kind": "arxiv",
    "version": 1
  }
}