Pith Number

pith:VX6MYG7Y

pith:2009:VX6MYG7YONW6WDJCLKAZ3JWF4L

not attested not anchored not stored refs pending

A curvature theory for discrete surfaces based on mesh parallelity

Alexander I. Bobenko, Helmut Pottmann, Johannes Wallner

arxiv:0901.4620 v1 · 2009-01-29 · 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{VX6MYG7YONW6WDJCLKAZ3JWF4L}

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	2026-05-18T00:36:04.384681Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

adfccc1bf8736deb0d225a819da6c5e2c391eba02e6938e6bc51ef9c17504515

Aliases

arxiv: 0901.4620 · arxiv_version: 0901.4620v1 · doi: 10.48550/arxiv.0901.4620 · pith_short_12: VX6MYG7YONW6 · pith_short_16: VX6MYG7YONW6WDJC · pith_short_8: VX6MYG7Y

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/VX6MYG7YONW6WDJCLKAZ3JWF4L \
  | 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: adfccc1bf8736deb0d225a819da6c5e2c391eba02e6938e6bc51ef9c17504515

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a1f512caf6e6ab7c17e1f88d2ce12f156e167e84297db8f69676ddc4e537fd7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-01-29T16:08:59Z",
    "title_canon_sha256": "bace0f21e4d16c83dbddf58528e14aad5a506d8fe85d0592ba1695be6c2258d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4620",
    "kind": "arxiv",
    "version": 1
  }
}