Pith Number

pith:V4OBZWBU

pith:2005:V4OBZWBURM3YQVEP5C7QETSWMF

not attested not anchored not stored refs pending

The characteristic cohomology class of a triangulated category

F. Muro, H.-J. Baues

arxiv:math/0505540 v2 · 2005-05-25 · math.KT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V4OBZWBURM3YQVEP5C7QETSWMF}

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	2026-07-04T17:18:07.173210Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af1c1cd8348b3788548fe8bf024e56617bc3d93b1493530b8c0cef86b065c80b

Aliases

arxiv: math/0505540 · arxiv_version: math/0505540v2 · doi: 10.48550/arxiv.math/0505540 · pith_short_12: V4OBZWBURM3Y · pith_short_16: V4OBZWBURM3YQVEP · pith_short_8: V4OBZWBU

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/V4OBZWBURM3YQVEP5C7QETSWMF \
  | 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: af1c1cd8348b3788548fe8bf024e56617bc3d93b1493530b8c0cef86b065c80b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bd15b26078578048b8dd9b1a18501505750b19ee2c66e32b82b599517072e66",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.KT",
    "submitted_at": "2005-05-25T13:43:16Z",
    "title_canon_sha256": "a465e425a7a28e73ce4dd1623d2851f0671fbd7ac195847d4d24316e11b368d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0505540",
    "kind": "arxiv",
    "version": 2
  }
}