Pith Number

pith:KD6SGAGK

pith:2011:KD6SGAGKZR73346UMJAGRGUSD7

not attested not anchored not stored refs pending

Contracting rigid germs in higher dimensions

Matteo Ruggiero

arxiv:1109.6803 v2 · 2011-09-30 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KD6SGAGKZR73346UMJAGRGUSD7}

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	2026-05-18T03:36:56.773029Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

50fd2300cacc7fbdf3d46240689a921fd3d7122f1a77c69c2e87266c7e4bb0c7

Aliases

arxiv: 1109.6803 · arxiv_version: 1109.6803v2 · doi: 10.48550/arxiv.1109.6803 · pith_short_12: KD6SGAGKZR73 · pith_short_16: KD6SGAGKZR73346U · pith_short_8: KD6SGAGK

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/KD6SGAGKZR73346UMJAGRGUSD7 \
  | 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: 50fd2300cacc7fbdf3d46240689a921fd3d7122f1a77c69c2e87266c7e4bb0c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da5f7d38594d3aa9a8d0d005f82105aa0d862c1a38ca9400452626eaee473b11",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2011-09-30T12:10:34Z",
    "title_canon_sha256": "9da2ae804c56629b47ea281d93bfc901424b8b107947ea20f9671dc3ab105f7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6803",
    "kind": "arxiv",
    "version": 2
  }
}