Pith Number

pith:DMS4BKKJ

pith:2008:DMS4BKKJX6KOUUOYBSCU4UK3ES

not attested not anchored not stored refs pending

Obstructions for Deformations of Complexes

Frauke M. Bleher, Ted Chinburg

arxiv:0901.0101 v2 · 2008-12-31 · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DMS4BKKJX6KOUUOYBSCU4UK3ES}

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	2026-05-18T03:14:30.709444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b25c0a949bf94ea51d80c854e515b2485370263855888bda81724468bb52b6a

Aliases

arxiv: 0901.0101 · arxiv_version: 0901.0101v2 · doi: 10.48550/arxiv.0901.0101 · pith_short_12: DMS4BKKJX6KO · pith_short_16: DMS4BKKJX6KOUUOY · pith_short_8: DMS4BKKJ

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/DMS4BKKJX6KOUUOYBSCU4UK3ES \
  | 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: 1b25c0a949bf94ea51d80c854e515b2485370263855888bda81724468bb52b6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3584a3f91b28e7119724f8323d8c317d6495ef28636dd7c838a4b8b100ed76b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2008-12-31T14:54:02Z",
    "title_canon_sha256": "041b2d8ece9fa65862a4b59a17f8f24e272757592fb91bfe3cff94c0182f2958"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.0101",
    "kind": "arxiv",
    "version": 2
  }
}