Pith Number

pith:WTMI2PD3

pith:2009:WTMI2PD35O35O5ZWSNKEANCWTM

not attested not anchored not stored refs pending

Homology of planar telescopic linkages

Michael Farber, Viktor Fromm

arxiv:0909.3023 v1 · 2009-09-16 · 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{WTMI2PD35O35O5ZWSNKEANCWTM}

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	2026-05-18T02:41:51.163582Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4d88d3c7bebb7d7773693544034569b244ba5da4efadedd92d92f9989292612

Aliases

arxiv: 0909.3023 · arxiv_version: 0909.3023v1 · doi: 10.48550/arxiv.0909.3023 · pith_short_12: WTMI2PD35O35 · pith_short_16: WTMI2PD35O35O5ZW · pith_short_8: WTMI2PD3

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/WTMI2PD35O35O5ZWSNKEANCWTM \
  | 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: b4d88d3c7bebb7d7773693544034569b244ba5da4efadedd92d92f9989292612

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7603c9533509a543c0c457b2564219ccbf93099f6fa8c70fcbe1c95ba9cf3c12",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2009-09-16T14:17:11Z",
    "title_canon_sha256": "3cc8637137ed3ac03c2ac37a87e48d4b8bcb5e246b4fa33373d27607f2ebc2c8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3023",
    "kind": "arxiv",
    "version": 1
  }
}