Pith Number

pith:UD2WPR6B

pith:2017:UD2WPR6BRBKR3MOIQH76Y7NEK6

not attested not anchored not stored refs pending

Spherical convexity and hyperbolic metric

Toshiyuki Sugawa

arxiv:1704.07944 v1 · 2017-04-26 · math.CV

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UD2WPR6BRBKR3MOIQH76Y7NEK6}

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	2026-05-18T00:45:31.452004Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0f567c7c188551db1c881ffec7da457b49cab81936715907af9ce58d0dc6d28

Aliases

arxiv: 1704.07944 · arxiv_version: 1704.07944v1 · doi: 10.48550/arxiv.1704.07944 · pith_short_12: UD2WPR6BRBKR · pith_short_16: UD2WPR6BRBKR3MOI · pith_short_8: UD2WPR6B

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/UD2WPR6BRBKR3MOIQH76Y7NEK6 \
  | 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: a0f567c7c188551db1c881ffec7da457b49cab81936715907af9ce58d0dc6d28

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5b3d6cf2b5f12aeeda81095b2fff58f7b6617f9ae9e882269511ed69dcf06b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2017-04-26T02:20:53Z",
    "title_canon_sha256": "cb2f1022adb24d1c03594a0ef3be9828787f1b7601230c2c91314c769c4fb7b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.07944",
    "kind": "arxiv",
    "version": 1
  }
}