Pith Number

pith:LXEMYYLK

pith:2020:LXEMYYLKG5CO7CFSIE3SSN5QHA

not attested not anchored not stored refs pending

On a generalization of the topological Brauer group

Andrei V. Ershov

arxiv:2004.05710 v17 · 2020-04-12 · math.KT · 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{LXEMYYLKG5CO7CFSIE3SSN5QHA}

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	2026-05-20T00:00:13.078992Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5dc8cc616a3744ef88b241372937b03820ddb4f88dc2e5be7231c065f1ded79b

Aliases

arxiv: 2004.05710 · arxiv_version: 2004.05710v17 · doi: 10.48550/arxiv.2004.05710 · pith_short_12: LXEMYYLKG5CO · pith_short_16: LXEMYYLKG5CO7CFS · pith_short_8: LXEMYYLK

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/LXEMYYLKG5CO7CFSIE3SSN5QHA \
  | 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: 5dc8cc616a3744ef88b241372937b03820ddb4f88dc2e5be7231c065f1ded79b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37fcd9bcea630f60b0f43539a40edb8dd3a49410cae65692066e523884fa11f3",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2020-04-12T22:51:37Z",
    "title_canon_sha256": "c843f793ed828b8bcd0dba8d3d35d7d1ca1f8a3da9efb15e9aaf1245536d3e3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.05710",
    "kind": "arxiv",
    "version": 17
  }
}