Pith Number

pith:XFQ7I7ZN

pith:2011:XFQ7I7ZNZUVRIDWFG4AWQTQUE5

not attested not anchored not stored refs pending

Isomorphism conjectures with proper coefficients

Eugenia Ellis, Guillermo Corti\~nas

arxiv:1108.5196 v3 · 2011-08-25 · math.KT · 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{XFQ7I7ZNZUVRIDWFG4AWQTQUE5}

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	2026-05-18T02:57:07.054044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b961f47f2dcd2b140ec53701684e1427540e89814da0fe85260bda201d129b14

Aliases

arxiv: 1108.5196 · arxiv_version: 1108.5196v3 · doi: 10.48550/arxiv.1108.5196 · pith_short_12: XFQ7I7ZNZUVR · pith_short_16: XFQ7I7ZNZUVRIDWF · pith_short_8: XFQ7I7ZN

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/XFQ7I7ZNZUVRIDWFG4AWQTQUE5 \
  | 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: b961f47f2dcd2b140ec53701684e1427540e89814da0fe85260bda201d129b14

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b3c3f7eebfc1f7b117d244360d16b44e714eca1fbc817499052675da2cb185c3",
    "cross_cats_sorted": [
      "math.AT",
      "math.OA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2011-08-25T20:45:55Z",
    "title_canon_sha256": "ecd075c4f3b16980fb7d86290970505e32ebac1e5694c7f6ba2b40d83a3f1a30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.5196",
    "kind": "arxiv",
    "version": 3
  }
}