Pith Number

pith:T73JOSDX

pith:2007:T73JOSDXGESQHTA6JPBKVUFDHI

not attested not anchored not stored refs pending

The K(\pi, 1) problem for the affine Artin group of type \widetilde{B}_n and its cohomology

Davide Moroni, Filippo Callegaro, Mario Salvetti

arxiv:0705.2830 v1 · 2007-05-19 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T73JOSDXGESQHTA6JPBKVUFDHI}

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	2026-05-18T03:44:24.935647Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ff6974877312503cc1e4bc2aad0a33a3cdcefba061ee49f22910fb6a57e3454

Aliases

arxiv: 0705.2830 · arxiv_version: 0705.2830v1 · doi: 10.48550/arxiv.0705.2830 · pith_short_12: T73JOSDXGESQ · pith_short_16: T73JOSDXGESQHTA6 · pith_short_8: T73JOSDX

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/T73JOSDXGESQHTA6JPBKVUFDHI \
  | 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: 9ff6974877312503cc1e4bc2aad0a33a3cdcefba061ee49f22910fb6a57e3454

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "596f333a7999a16b86c8e67fbda319a1061ddbb52bc54cbebeaaa0577963df00",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AT",
    "submitted_at": "2007-05-19T17:26:33Z",
    "title_canon_sha256": "8a4e9951aa0f8393e55900f5e916323f62e4fcdaa514c2fb321d1ab96afc0855"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.2830",
    "kind": "arxiv",
    "version": 1
  }
}