Pith Number

pith:UE7EBXKI

pith:2010:UE7EBXKIMDAJ4N3GFBULZZIOV2

not attested not anchored not stored refs pending

Finite and infinitesimal flexibility of semidiscrete surfaces

Oleg Karpenkov

arxiv:1004.2420 v3 · 2010-04-14 · math.DG · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UE7EBXKIMDAJ4N3GFBULZZIOV2}

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	2026-05-18T01:36:48.621309Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a13e40dd4860c09e37662868bce50eae82978f3519b80215dd33bddbd92dd374

Aliases

arxiv: 1004.2420 · arxiv_version: 1004.2420v3 · doi: 10.48550/arxiv.1004.2420 · pith_short_12: UE7EBXKIMDAJ · pith_short_16: UE7EBXKIMDAJ4N3G · pith_short_8: UE7EBXKI

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/UE7EBXKIMDAJ4N3GFBULZZIOV2 \
  | 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: a13e40dd4860c09e37662868bce50eae82978f3519b80215dd33bddbd92dd374

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0e9e6f8d16e8c7819425fefb514997dc334ca34f5d3e1bee39d917225df2d63",
    "cross_cats_sorted": [
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2010-04-14T15:39:11Z",
    "title_canon_sha256": "19db42260b967fdb2dc2a552b2257483b6d752de0d7c2314ff8dcbce2be81e1b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.2420",
    "kind": "arxiv",
    "version": 3
  }
}