Pith Number

pith:B3ERQZFX

pith:2022:B3ERQZFXK36ZTUFXTEVJGFRNQD

not attested not anchored not stored refs pending

A note on noncommutative CW-spectra

Thomas Blom

arxiv:2201.04894 v2 · 2022-01-13 · math.AT · 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{B3ERQZFXK36ZTUFXTEVJGFRNQD}

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	2026-07-05T11:53:38.088672Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ec91864b756fd99d0b7992a93162d80de9d684ba1a2d4ba6a92d04b4fe899da

Aliases

arxiv: 2201.04894 · arxiv_version: 2201.04894v2 · doi: 10.48550/arxiv.2201.04894 · pith_short_12: B3ERQZFXK36Z · pith_short_16: B3ERQZFXK36ZTUFX · pith_short_8: B3ERQZFX

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/B3ERQZFXK36ZTUFXTEVJGFRNQD \
  | 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: 0ec91864b756fd99d0b7992a93162d80de9d684ba1a2d4ba6a92d04b4fe899da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3d3696d13f616a38777ef11fc03813eca13c6486a49bfef8e8b245a1a69aa58",
    "cross_cats_sorted": [
      "math.OA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2022-01-13T11:33:01Z",
    "title_canon_sha256": "9fa126763a59f6379ed8fe08e9d79901df84aa370b7630b29ed9822681d1e0e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.04894",
    "kind": "arxiv",
    "version": 2
  }
}