Pith Number

pith:FD2LWQN6

pith:2011:FD2LWQN64CHP62V3ARZJQKRKGH

not attested not anchored not stored refs pending

Du Bois singularities deform

Karl Schwede, S\'andor J Kov\'acs

arxiv:1107.2349 v3 · 2011-07-12 · math.AG · math.AC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FD2LWQN64CHP62V3ARZJQKRKGH}

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	2026-05-18T03:51:48.849684Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28f4bb41bee08eff6abb0472982a2a31e33e000c169c8f15280da9da4d28672d

Aliases

arxiv: 1107.2349 · arxiv_version: 1107.2349v3 · doi: 10.48550/arxiv.1107.2349 · pith_short_12: FD2LWQN64CHP · pith_short_16: FD2LWQN64CHP62V3 · pith_short_8: FD2LWQN6

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/FD2LWQN64CHP62V3ARZJQKRKGH \
  | 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: 28f4bb41bee08eff6abb0472982a2a31e33e000c169c8f15280da9da4d28672d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2ef1f569fc5f1212bf35b9b7e80ad4d2d51a89911ce3ce710948200e3c939c1",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2011-07-12T17:03:34Z",
    "title_canon_sha256": "e3530efaeb79081f8f09c848ebfce7288638589dbca38bb973cd827f176ac169"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.2349",
    "kind": "arxiv",
    "version": 3
  }
}