Pith Number

pith:KUDPGNNT

pith:2017:KUDPGNNTGP7W7HI3Z3RKCM2RQF

not attested not anchored not stored refs pending

From Foucault's Pendulum to the Gauss--Bonnet Theorem

Orlin Stoytchev

arxiv:1701.01666 v3 · 2017-01-06 · math.HO · math.AT · 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{KUDPGNNTGP7W7HI3Z3RKCM2RQF}

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	2026-05-18T00:31:22.219678Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5506f335b333ff6f9d1bcee2a13351816011a490161d32facfbc9a919c0b53ef

Aliases

arxiv: 1701.01666 · arxiv_version: 1701.01666v3 · doi: 10.48550/arxiv.1701.01666 · pith_short_12: KUDPGNNTGP7W · pith_short_16: KUDPGNNTGP7W7HI3 · pith_short_8: KUDPGNNT

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/KUDPGNNTGP7W7HI3Z3RKCM2RQF \
  | 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: 5506f335b333ff6f9d1bcee2a13351816011a490161d32facfbc9a919c0b53ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10699bff9270213e8cbf29db4d87650d4fa2ff86217a818a93dbadb27feabdd2",
    "cross_cats_sorted": [
      "math.AT",
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2017-01-06T15:34:35Z",
    "title_canon_sha256": "5b4e161bb13bcf624d85d1d9dd6944903a439eda045d2352aba2883dd9a68ed3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.01666",
    "kind": "arxiv",
    "version": 3
  }
}