Pith Number

pith:GQQZYU2S

pith:2008:GQQZYU2SZSJCRPAUIJ5AAYOUZZ

not attested not anchored not stored refs pending

On the cohomology of a simple normal crossings divisor

Parsa Bakhtary

arxiv:0811.2246 v1 · 2008-11-14 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GQQZYU2SZSJCRPAUIJ5AAYOUZZ}

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	2026-05-18T03:57:53.895926Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

34219c5352cc9228bc14427a0061d4ce7a167850ced29df3b3c68c57859eb414

Aliases

arxiv: 0811.2246 · arxiv_version: 0811.2246v1 · doi: 10.48550/arxiv.0811.2246 · pith_short_12: GQQZYU2SZSJC · pith_short_16: GQQZYU2SZSJCRPAU · pith_short_8: GQQZYU2S

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/GQQZYU2SZSJCRPAUIJ5AAYOUZZ \
  | 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: 34219c5352cc9228bc14427a0061d4ce7a167850ced29df3b3c68c57859eb414

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf5112e5249b5e758c5beb9eaae31ba8705b882bdb18b802e272701f10cb0133",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-11-14T00:09:19Z",
    "title_canon_sha256": "cc472e73622b60b77ef5093ce9b7c58dde6289f673227c054c1a15253f36d19e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0811.2246",
    "kind": "arxiv",
    "version": 1
  }
}