Pith Number

pith:HZHF4BJR

pith:2011:HZHF4BJRKLVWHE5KOVE7PO55MJ

not attested not anchored not stored refs pending

A refined Bloch group and the third homology of SL_2 of a field

Kevin Hutchinson

arxiv:1101.3279 v5 · 2011-01-17 · 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{HZHF4BJRKLVWHE5KOVE7PO55MJ}

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	2026-05-18T02:22:51.965633Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e4e5e053152eb6393aa7549f7bbbd62789f7c6b9fc6275a445433279f79ed46

Aliases

arxiv: 1101.3279 · arxiv_version: 1101.3279v5 · doi: 10.48550/arxiv.1101.3279 · pith_short_12: HZHF4BJRKLVW · pith_short_16: HZHF4BJRKLVWHE5K · pith_short_8: HZHF4BJR

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/HZHF4BJRKLVWHE5KOVE7PO55MJ \
  | 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: 3e4e5e053152eb6393aa7549f7bbbd62789f7c6b9fc6275a445433279f79ed46

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a0d1d63736ba2464a30a2a77d66d0a6a8824131d9aac524e7e7429b3bddab5f3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2011-01-17T17:50:16Z",
    "title_canon_sha256": "03491f8ce1edd4a0bcab0f48410a76575827a90e383e9024fb6222e2e6ba4974"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.3279",
    "kind": "arxiv",
    "version": 5
  }
}