Pith Number

pith:3PT5ISKS

pith:2009:3PT5ISKSQE365QDF74BQAXWMHD

not attested not anchored not stored refs pending

Niveau and coniveau filtrations on cohomology groups and Chow groups

Charles Vial

arxiv:0907.3535 v3 · 2009-07-21 · 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{3PT5ISKSQE365QDF74BQAXWMHD}

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	2026-05-18T02:19:36.683820Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dbe7d449528137eec065ff03005ecc38f07d4a75d54107cc523b409acda9169f

Aliases

arxiv: 0907.3535 · arxiv_version: 0907.3535v3 · doi: 10.48550/arxiv.0907.3535 · pith_short_12: 3PT5ISKSQE36 · pith_short_16: 3PT5ISKSQE365QDF · pith_short_8: 3PT5ISKS

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/3PT5ISKSQE365QDF74BQAXWMHD \
  | 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: dbe7d449528137eec065ff03005ecc38f07d4a75d54107cc523b409acda9169f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b482be593b9eb78b2f42603c7bb51106f3f5da100ebb13e374dc16ee38ff49c9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-07-21T05:00:30Z",
    "title_canon_sha256": "33027094bf9d9bfd71ba1d2080c7907bbe18b096837c219019ac2dff2dbde0ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3535",
    "kind": "arxiv",
    "version": 3
  }
}