Pith Number

pith:C3NTIKGU

pith:2014:C3NTIKGUCX7V2HBKETULT4JEHH

not attested not anchored not stored refs pending

Non-additive functors and Euler characteristics

Lenny Taelman, Niels uit de Bos

arxiv:1410.6908 v4 · 2014-10-25 · math.KT · math.AC · math.RT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C3NTIKGUCX7V2HBKETULT4JEHH}

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	2026-05-18T01:17:44.230046Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16db3428d415ff5d1c2a24e8b9f12439e153833b30904345b3d6d674abfc756e

Aliases

arxiv: 1410.6908 · arxiv_version: 1410.6908v4 · doi: 10.48550/arxiv.1410.6908 · pith_short_12: C3NTIKGUCX7V · pith_short_16: C3NTIKGUCX7V2HBK · pith_short_8: C3NTIKGU

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/C3NTIKGUCX7V2HBKETULT4JEHH \
  | 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: 16db3428d415ff5d1c2a24e8b9f12439e153833b30904345b3d6d674abfc756e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f416f6ff28f44421129a3e7c7ab7e4cec3051ba0f951c9256d8627378ce66af",
    "cross_cats_sorted": [
      "math.AC",
      "math.RT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2014-10-25T10:12:42Z",
    "title_canon_sha256": "7bc9ec4a3bd03443a2238dc368fc69e416608dd24fc70c766ebc108d73e89449"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.6908",
    "kind": "arxiv",
    "version": 4
  }
}