Pith Number

pith:AA2XKGS4

pith:2022:AA2XKGS43F2ZY636QZ3FJJ63BM

not attested not anchored not stored refs pending

A Constructive Proof that Many Groups with Non-Torsion 2-Cohomology are Not Matricially Stable

Forrest Glebe

arxiv:2204.10354 v4 · 2022-04-21 · math.GR · math.KT · math.OA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AA2XKGS43F2ZY636QZ3FJJ63BM}

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.

Cited by

1 paper in Pith

Conditional representation stability, classification of $*$-homomorphisms, and relative eta invariants

Receipt and verification

First computed	2026-07-05T07:59:12.874265Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0035751a5cd9759c7b7e867654a7db0b0c3d38bec8cd325973365a3ae335c52b

Aliases

arxiv: 2204.10354 · arxiv_version: 2204.10354v4 · doi: 10.48550/arxiv.2204.10354 · pith_short_12: AA2XKGS43F2Z · pith_short_16: AA2XKGS43F2ZY636 · pith_short_8: AA2XKGS4

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/AA2XKGS43F2ZY636QZ3FJJ63BM \
  | 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: 0035751a5cd9759c7b7e867654a7db0b0c3d38bec8cd325973365a3ae335c52b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d0982a27249e07114cfcb7eef563a684690ce71f91f6cc40ccab18b36a6c50e",
    "cross_cats_sorted": [
      "math.KT",
      "math.OA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2022-04-21T18:24:39Z",
    "title_canon_sha256": "3136982522ea6fa050cc1c285a3b0225b8489a7d73a5de94fed86bd13a809d75"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.10354",
    "kind": "arxiv",
    "version": 4
  }
}