Pith Number

pith:5I5PLZKZ

pith:2008:5I5PLZKZ46XN4YCRPFE6IOMEOW

not attested not anchored not stored refs pending

Algebraic monodromy and obstructions to formality

Alexander I. Suciu, Stefan Papadima

arxiv:0901.0105 v2 · 2008-12-31 · math.AT · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5I5PLZKZ46XN4YCRPFE6IOMEOW}

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	2026-05-18T04:38:50.966406Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea3af5e559e7aede60517949e4398475b171ad5dd0387bcef03dda7a8d1ff734

Aliases

arxiv: 0901.0105 · arxiv_version: 0901.0105v2 · doi: 10.48550/arxiv.0901.0105 · pith_short_12: 5I5PLZKZ46XN · pith_short_16: 5I5PLZKZ46XN4YCR · pith_short_8: 5I5PLZKZ

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/5I5PLZKZ46XN4YCRPFE6IOMEOW \
  | 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: ea3af5e559e7aede60517949e4398475b171ad5dd0387bcef03dda7a8d1ff734

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d558e74fa20911de23c67c962f81878c3fd8beefed71c263cb62613fd22b3cf2",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2008-12-31T15:16:27Z",
    "title_canon_sha256": "85d3f4477a14a8d69d8bda69bc0aca8be832086c7990a035a59ac4f3aabff25e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.0105",
    "kind": "arxiv",
    "version": 2
  }
}